System.Windows.Forms Namespace

Contains classes for creating Windows-based applications that take full advantage of the rich user interface features available in the Microsoft Windows operating system.

Classes

AccessibleObject	Provides information that accessibility applications use to adjust an application's user interface (UI) for users with impairments.
AmbientProperties	Provides ambient property values to top-level controls.
Application	Provides static methods and properties to manage an application, such as methods to start and stop an application, to process Windows messages, and properties to get information about an application. This class cannot be inherited.
ApplicationContext	Specifies the contextual information about an application thread.
AutoCompleteStringCollection	Contains a collection of strings to use for the auto-complete feature on certain Windows Forms controls.
AxHost	Wraps ActiveX controls and exposes them as fully featured Windows Forms controls.
AxHost.AxComponentEditor	Provides an editor that uses a modal dialog box to display a property page for an ActiveX control.
AxHost.ClsidAttribute	Specifies the CLSID of an ActiveX control hosted by an AxHost control.
AxHost.ConnectionPointCookie	Connects an ActiveX control to a client that handles the control's events.
AxHost.InvalidActiveXStateException	The exception that is thrown when the ActiveX control is referenced while in an invalid state.
AxHost.State	Encapsulates the persisted state of an ActiveX control.
AxHost.StateConverter	Converts AxHost.State objects from one data type to another.
AxHost.TypeLibraryTimeStampAttribute	Specifies a date and time associated with the type library of an ActiveX control hosted by an AxHost control.
BaseCollection	Provides the base functionality for creating data-related collections in the System.Windows.Forms namespace.
BindableComponent	Base class for components that provide properties that can be data bound with the Windows Forms Designer.
Binding	Represents the simple binding between the property value of an object and the property value of a control.
BindingCompleteEventArgs	Provides data for the BindingComplete event.
BindingContext	Manages the collection of BindingManagerBase objects for any object that inherits from the Control class.
BindingManagerBase	Manages all Binding objects that are bound to the same data source and data member. This class is abstract.
BindingManagerDataErrorEventArgs	Provides data for the DataError event.
BindingNavigator	Represents the navigation and manipulation user interface (UI) for controls on a form that are bound to data.
BindingsCollection	Represents a collection of Binding objects for a control.
BindingSource	Encapsulates the data source for a form.
Button	Represents a Windows button control.
ButtonBase	Implements the basic functionality common to button controls.
ButtonBase.ButtonBaseAccessibleObject	Provides information that accessibility applications use to adjust an application's user interface for users with disabilities.
ButtonRenderer	Provides methods used to render a button control with or without visual styles. This class cannot be inherited.
CacheVirtualItemsEventArgs	Provides data for the CacheVirtualItems event.
CheckBox	Represents a Windows CheckBox.
CheckBox.CheckBoxAccessibleObject	Provides information about the CheckBox control to accessibility client applications.
CheckBoxRenderer	Provides methods used to render a check box control with or without visual styles. This class cannot be inherited.
CheckedListBox	Displays a ListBox in which a check box is displayed to the left of each item.
CheckedListBox.CheckedIndexCollection	Encapsulates the collection of indexes of checked items (including items in an indeterminate state) in a CheckedListBox.
CheckedListBox.CheckedItemCollection	Encapsulates the collection of checked items, including items in an indeterminate state, in a CheckedListBox control.
CheckedListBox.ObjectCollection	Represents the collection of items in a CheckedListBox.
Clipboard	Provides methods to place data on and retrieve data from the system Clipboard. This class cannot be inherited.
ColorDialog	Represents a common dialog box that displays available colors along with controls that enable the user to define custom colors.
ColumnClickEventArgs	Provides data for the ColumnClick event.
ColumnHeader	Displays a single column header in a ListView control.
ColumnHeaderConverter	Provides a type converter to convert ColumnHeader objects from one type to another.
ColumnReorderedEventArgs	Provides data for the ColumnReordered event.
ColumnStyle	Represents the look and feel of a column in a table layout.
ColumnWidthChangedEventArgs	Provides data for the ColumnWidthChanged event.
ColumnWidthChangingEventArgs	Provides data for the ColumnWidthChanging event.
ComboBox	Represents a Windows combo box control.
ComboBox.ChildAccessibleObject	Provides information about the ComboBox control to accessibility client applications.
ComboBox.ObjectCollection	Represents the collection of items in a ComboBox.
ComboBoxRenderer	Provides methods used to render a combo box control with visual styles. This class cannot be inherited.
CommonDialog	Specifies the base class used for displaying dialog boxes on the screen.
ContainerControl	Provides focus-management functionality for controls that can function as a container for other controls.
ContentsResizedEventArgs	Provides data for the ContentsResized event.
ContextMenuStrip	Represents a shortcut menu.
Control	Defines the base class for controls, which are components with visual representation.
Control.ControlAccessibleObject	Provides information about a control that can be used by an accessibility application.
Control.ControlCollection	Represents a collection of Control objects.
ControlBindingsCollection	Represents the collection of data bindings for a control.
ControlEventArgs	Provides data for the ControlAdded and ControlRemoved events.
ControlPaint	Provides methods used to paint common Windows controls and their elements. This class cannot be inherited.
ConvertEventArgs	Provides data for the Format and Parse events.
CreateParams	Encapsulates the information needed when creating a control.
CurrencyManager	Manages a list of Binding objects.
Cursor	Represents the image used to paint the mouse pointer.
CursorConverter	Provides a type converter to convert Cursor objects to and from various other representations.
Cursors	Provides a collection of Cursor objects for use by a Windows Forms application.
DataFormats	Provides static, predefined Clipboard format names. Use them to identify the format of data that you store in an IDataObject.
DataFormats.Format	Represents a Clipboard format type.
DataGridView	Displays data in a customizable grid.
DataGridView.DataGridViewAccessibleObject	Provides information about the DataGridView control to accessibility client applications.
DataGridView.DataGridViewControlCollection	Represents a collection of controls contained on a DataGridView.
DataGridView.DataGridViewTopRowAccessibleObject	Provides information about a row of DataGridViewColumnHeaderCell objects to accessibility client applications.
DataGridView.HitTestInfo	Contains information, such as the row and column indexes, about a specific coordinate pair in the DataGridView control. This class cannot be inherited.
DataGridViewAdvancedBorderStyle	Contains border styles for the cells in a DataGridView control.
DataGridViewAutoSizeColumnModeEventArgs	Provides data for the AutoSizeColumnModeChanged event.
DataGridViewAutoSizeColumnsModeEventArgs	Provides data for the AutoSizeColumnsModeChanged event.
DataGridViewAutoSizeModeEventArgs	Provides data for the DataGridViewAutoSizeRowsModeChanged and RowHeadersWidthSizeModeChanged events.
DataGridViewBand	Represents a linear collection of elements in a DataGridView control.
DataGridViewBindingCompleteEventArgs	Provides data for the DataBindingComplete event.
DataGridViewButtonCell	Displays a button-like user interface (UI) for use in a DataGridView control.
DataGridViewButtonCell.DataGridViewButtonCellAccessibleObject	Provides information about a DataGridViewButtonCell to accessibility client applications.
DataGridViewButtonColumn	Hosts a collection of DataGridViewButtonCell objects.
DataGridViewCell	Represents an individual cell in a DataGridView control.
DataGridViewCell.DataGridViewCellAccessibleObject	Provides information about a DataGridViewCell to accessibility client applications.
DataGridViewCellCancelEventArgs	Provides data for CellBeginEdit and RowValidating events.
DataGridViewCellCollection	Represents a collection of cells in a DataGridViewRow.
DataGridViewCellContextMenuStripNeededEventArgs	Provides data for the CellContextMenuStripNeeded event.
DataGridViewCellErrorTextNeededEventArgs	Provides data for the CellErrorTextNeeded event of a DataGridView control.
DataGridViewCellEventArgs	Provides data for DataGridView events related to cell and row operations.
DataGridViewCellFormattingEventArgs	Provides data for the CellFormatting event of a DataGridView.
DataGridViewCellMouseEventArgs	Provides data for mouse events raised by a DataGridView whenever the mouse is moved within a DataGridViewCell.
DataGridViewCellPaintingEventArgs	Provides data for the CellPainting event.
DataGridViewCellParsingEventArgs	Provides data for the CellParsing event of a DataGridView control.
DataGridViewCellStateChangedEventArgs	Provides data for the CellStateChanged event.
DataGridViewCellStyle	Represents the formatting and style information applied to individual cells within a DataGridView control.
DataGridViewCellStyleContentChangedEventArgs	Provides data for the CellStyleContentChanged event.
DataGridViewCellStyleConverter	Converts DataGridViewCellStyle objects to and from other data types.
DataGridViewCellToolTipTextNeededEventArgs	Provides data for the CellToolTipTextNeeded event.
DataGridViewCellValidatingEventArgs	Provides data for the CellValidating event of a DataGridView control.
DataGridViewCellValueEventArgs	Provides data for the CellValueNeeded and CellValuePushed events of the DataGridView control.
DataGridViewCheckBoxCell	Displays a check box user interface (UI) to use in a DataGridView control.
DataGridViewCheckBoxCell.DataGridViewCheckBoxCellAccessibleObject	Provides information about a DataGridViewCheckBoxCell to accessibility client applications.
DataGridViewCheckBoxColumn	Hosts a collection of DataGridViewCheckBoxCell objects.
DataGridViewColumn	Represents a column in a DataGridView control.
DataGridViewColumnCollection	Represents a collection of DataGridViewColumn objects in a DataGridView control.
DataGridViewColumnDesignTimeVisibleAttribute	Specifies whether a column type is visible in the DataGridView designer. This class cannot be inherited.
DataGridViewColumnDividerDoubleClickEventArgs	Provides data for the ColumnDividerDoubleClick event of a DataGridView.
DataGridViewColumnEventArgs	Provides data for column-related events of a DataGridView.
DataGridViewColumnHeaderCell	Represents a column header in a DataGridView control.
DataGridViewColumnHeaderCell.DataGridViewColumnHeaderCellAccessibleObject	Provides information about a DataGridViewColumnHeaderCell to accessibility client applications.
DataGridViewColumnStateChangedEventArgs	Provides data for the ColumnStateChanged event.
DataGridViewComboBoxCell	Displays a combo box in a DataGridView control.
DataGridViewComboBoxCell.DataGridViewComboBoxCellAccessibleObject	Represents the accessibility object for the current DataGridViewComboBoxCell object.
DataGridViewComboBoxCell.ObjectCollection	Represents the collection of selection choices in a DataGridViewComboBoxCell.
DataGridViewComboBoxColumn	Represents a column of DataGridViewComboBoxCell objects.
DataGridViewComboBoxEditingControl	Represents the hosted combo box control in a DataGridViewComboBoxCell.
DataGridViewDataErrorEventArgs	Provides data for the DataError event.
DataGridViewEditingControlShowingEventArgs	Provides data for the EditingControlShowing event.
DataGridViewElement	Provides the base class for elements of a DataGridView control.
DataGridViewHeaderCell	Contains functionality common to row header cells and column header cells.
DataGridViewImageCell	Displays a graphic in a DataGridView control.
DataGridViewImageCell.DataGridViewImageCellAccessibleObject	Provides information about a DataGridViewImageCell to accessibility client applications.
DataGridViewImageColumn	Hosts a collection of DataGridViewImageCell objects.
DataGridViewLinkCell	Represents a cell that contains a link.
DataGridViewLinkCell.DataGridViewLinkCellAccessibleObject	Provides information about a DataGridViewLinkCell control to accessibility client applications.
DataGridViewLinkColumn	Represents a column of cells that contain links in a DataGridView control.
DataGridViewRow	Represents a row in a DataGridView control.
DataGridViewRow.DataGridViewRowAccessibleObject	Provides information about a DataGridViewRow to accessibility client applications.
DataGridViewRowCancelEventArgs	Provides data for the UserDeletingRow event of a DataGridView.
DataGridViewRowCollection	A collection of DataGridViewRow objects.
DataGridViewRowContextMenuStripNeededEventArgs	Provides data for the RowContextMenuStripNeeded event.
DataGridViewRowDividerDoubleClickEventArgs	Provides data for the RowDividerDoubleClick event of a DataGridView.
DataGridViewRowErrorTextNeededEventArgs	Provides data for the RowErrorTextNeeded event of a DataGridView control.
DataGridViewRowEventArgs	Provides data for row-related DataGridView events.
DataGridViewRowHeaderCell	Represents a row header of a DataGridView control.
DataGridViewRowHeaderCell.DataGridViewRowHeaderCellAccessibleObject	Provides information about a DataGridViewRowHeaderCell to accessibility client applications.
DataGridViewRowHeightInfoNeededEventArgs	Provides data for the RowHeightInfoNeeded event of a DataGridView.
DataGridViewRowHeightInfoPushedEventArgs	Provides data for the RowHeightInfoPushed event of a DataGridView.
DataGridViewRowPostPaintEventArgs	Provides data for the RowPostPaint event.
DataGridViewRowPrePaintEventArgs	Provides data for the RowPrePaint event.
DataGridViewRowsAddedEventArgs	Provides data for the RowsAdded event.
DataGridViewRowsRemovedEventArgs	Provides data for the RowsRemoved event.
DataGridViewRowStateChangedEventArgs	Provides data for the RowStateChanged event of a DataGridView.
DataGridViewSelectedCellCollection	Represents a collection of cells that are selected in a DataGridView.
DataGridViewSelectedColumnCollection	Represents a collection of DataGridViewColumn objects that are selected in a DataGridView.
DataGridViewSelectedRowCollection	Represents a collection of DataGridViewRow objects that are selected in a DataGridView.
DataGridViewSortCompareEventArgs	Provides data for the SortCompare event.
DataGridViewTextBoxCell	Displays editable text information in a DataGridView control.
DataGridViewTextBoxCell.DataGridViewTextBoxCellAccessibleObject	Represents the accessibility object for the current DataGridViewTextBoxCell object.
DataGridViewTextBoxColumn	Hosts a collection of DataGridViewTextBoxCell cells.
DataGridViewTextBoxEditingControl	Represents a text box control that can be hosted in a DataGridViewTextBoxCell.
DataGridViewTopLeftHeaderCell	Represents the cell in the top left corner of the DataGridView that sits above the row headers and to the left of the column headers.
DataGridViewTopLeftHeaderCell.DataGridViewTopLeftHeaderCellAccessibleObject	Provides information about a DataGridViewTopLeftHeaderCell to accessibility client applications.
DataObject	Implements a basic data transfer mechanism.
DateBoldEventArgs	Provides data for events that are internal to the MonthCalendar control.
DateRangeEventArgs	Provides data for the DateChanged or DateSelected events of the MonthCalendar control.
DateTimePicker	Represents a Windows control that allows the user to select a date and a time and to display the date and time with a specified format.
DateTimePicker.DateTimePickerAccessibleObject	Provides information about the DateTimePicker control to accessibility client applications.
DockingAttribute	Specifies the default docking behavior for a control.
DomainUpDown	Represents a Windows spin box (also known as an up-down control) that displays string values.
DomainUpDown.DomainItemAccessibleObject	Provides information about the items in the DomainUpDown control to accessibility client applications.
DomainUpDown.DomainUpDownAccessibleObject	Provides information about the DomainUpDown control to accessibility client applications.
DomainUpDown.DomainUpDownItemCollection	Encapsulates a collection of objects for use by the DomainUpDown class.
DpiChangedEventArgs	Provides data for the DPIChanged events of a form or control.
DragEventArgs	Provides data for the DragDrop, DragEnter, or DragOver event.
DrawItemEventArgs	Provides data for the DrawItem event.
DrawListViewColumnHeaderEventArgs	Provides data for the DrawColumnHeader event.
DrawListViewItemEventArgs	Provides data for the DrawItem event.
DrawListViewSubItemEventArgs	Provides data for the DrawSubItem event.
DrawToolTipEventArgs	Provides data for the Draw event.
DrawTreeNodeEventArgs	Provides data for the DrawNode event.
ErrorProvider	Provides a user interface for indicating that a control on a form has an error associated with it.
FeatureSupport	Provides static methods for retrieving feature information from the current system.
FileDialog	Displays a dialog box from which the user can select a file.
FileDialogCustomPlace	Represents an entry in a FileDialog custom place collection for Windows Vista.
FileDialogCustomPlacesCollection	Represents a collection of Windows Vista custom places for the FileDialog class.
FlatButtonAppearance	Provides properties that specify the appearance of Button controls whose FlatStyle is Flat.
FlowLayoutPanel	Represents a panel that dynamically lays out its contents horizontally or vertically.
FlowLayoutSettings	Collects the characteristics associated with flow layouts.
FolderBrowserDialog	Prompts the user to select a folder. This class cannot be inherited.
FontDialog	Prompts the user to choose a font from among those installed on the local computer.
Form	Represents a window or dialog box that makes up an application's user interface.
Form.ControlCollection	Represents a collection of controls on the form.
FormClosedEventArgs	Provides data for the FormClosed event.
FormClosingEventArgs	Provides data for the FormClosing event.
FormCollection	Represents a collection of Form objects.
GiveFeedbackEventArgs	Provides data for the GiveFeedback event, which occurs during a drag operation.
GridItem	Implements one row in a PropertyGrid.
GridItemCollection	Contains a collection of GridItem objects.
GroupBox	Represents a Windows control that displays a frame around a group of controls with an optional caption.
GroupBoxRenderer	Provides methods used to render a group box control with or without visual styles. This class cannot be inherited.
HandledMouseEventArgs	Allows a custom control to prevent the MouseWheel event from being sent to its parent container.
Help	Encapsulates the HTML Help 1.0 engine.
HelpEventArgs	Provides data for the HelpRequested event.
HelpProvider	Provides pop-up or online Help for controls.
HScrollBar	Represents a standard Windows horizontal scroll bar.
HScrollProperties	Provides basic properties for the HScrollBar.
HtmlDocument	Provides top-level programmatic access to an HTML document hosted by the WebBrowser control.
HtmlElement	Represents an HTML element inside of a Web page.
HtmlElementCollection	Defines a collection of HtmlElement objects.
HtmlElementErrorEventArgs	Provides data for the Error event.
HtmlElementEventArgs	Provides data for the events defined on HtmlDocument and HtmlElement.
HtmlHistory	Manages the list of documents and Web sites the user has visited within the current session.
HtmlWindow	Represents the logical window that contains one or more instances of HtmlDocument.
HtmlWindowCollection	Represents the windows contained within another HtmlWindow.
ImageIndexConverter	Provides a type converter to convert data for an image index to and from a string.
ImageKeyConverter	Provides a type converter to convert data for an image key to and from another data type.
ImageList	Provides methods to manage a collection of Image objects. This class cannot be inherited.
ImageList.ImageCollection	Encapsulates the collection of Image objects in an ImageList.
ImageListStreamer	Provides the data portion of an ImageList.
ImeContext	Contains static methods that interact directly with the IME API.
InputLanguage	Provides methods and fields to manage the input language. This class cannot be inherited.
InputLanguageChangedEventArgs	Provides data for the InputLanguageChanged event.
InputLanguageChangingEventArgs	Provides data for the InputLanguageChanging event.
InputLanguageCollection	Stores InputLanguage objects.
InvalidateEventArgs	Provides data for the Invalidated event.
ItemChangedEventArgs	Provides data for the ItemChanged event.
ItemCheckedEventArgs	Provides data for the ItemChecked event of the ListView control.
ItemCheckEventArgs	Provides data for the ItemCheck event of the CheckedListBox and ListView controls.
ItemDragEventArgs	Provides data for the ItemDrag event of the ListView and TreeView controls.
KeyEventArgs	Provides data for the KeyDown or KeyUp event.
KeyPressEventArgs	Provides data for the KeyPress event.
KeysConverter	Provides a TypeConverter to convert Keys objects to and from other representations.
Label	Represents a standard Windows label.
LabelEditEventArgs	Provides data for the BeforeLabelEdit and AfterLabelEdit events.
LayoutEventArgs	Provides data for the Layout event. This class cannot be inherited.
LayoutSettings	Provides a base class for collecting layout scheme characteristics.
LinkArea.LinkAreaConverter	Provides a type converter to convert LinkArea.LinkAreaConverter objects to and from various other representations.
LinkClickedEventArgs	Provides data for the LinkClicked event.
LinkConverter	Provides a type converter for LinkLabel.Link objects.
LinkLabel	Represents a Windows label control that can display hyperlinks.
LinkLabel.Link	Represents a link within a LinkLabel control.
LinkLabel.LinkCollection	Represents the collection of links within a LinkLabel control.
LinkLabelLinkClickedEventArgs	Provides data for the LinkClicked event.
ListBindingConverter	Provides a type converter to convert Binding objects to and from various other representations.
ListBindingHelper	Provides functionality to discover a bindable list and the properties of the items contained in the list when they differ from the public properties of the object to which they bind.
ListBox	Represents a Windows control to display a list of items.
ListBox.IntegerCollection	Represents a collection of integers in a ListBox.
ListBox.ObjectCollection	Represents the collection of items in a ListBox.
ListBox.SelectedIndexCollection	Represents the collection containing the indexes to the selected items in a ListBox.
ListBox.SelectedObjectCollection	Represents the collection of selected items in the ListBox.
ListControl	Provides a common implementation of members for the ListBox and ComboBox classes.
ListControlConvertEventArgs	Provides data for the Format event.
ListView	Represents a Windows list view control, which displays a collection of items that can be displayed using one of four different views.
ListView.CheckedIndexCollection	Represents the collection containing the indexes to the checked items in a list view control.
ListView.CheckedListViewItemCollection	Represents the collection of checked items in a list view control.
ListView.ColumnHeaderCollection	Represents the collection of column headers in a ListView control.
ListView.ListViewItemCollection	Represents the collection of items in a ListView control or assigned to a ListViewGroup.
ListView.SelectedIndexCollection	Represents the collection that contains the indexes to the selected items in a ListView control.
ListView.SelectedListViewItemCollection	Represents the collection of selected items in a list view control.
ListViewGroup	Represents a group of items displayed within a ListView control.
ListViewGroupCollection	Represents the collection of groups within a ListView control.
ListViewGroupEventArgs	Provides data for the OnGroupCollapsedStateChanged(ListViewGroupEventArgs) and OnGroupTaskLinkClick(ListViewGroupEventArgs) event.
ListViewHitTestInfo	Contains information about an area of a ListView control or a ListViewItem.
ListViewInsertionMark	Used to indicate the expected drop location when an item is dragged to a new position in a ListView control. This functionality is available only on Windows XP and later.
ListViewItem	Represents an item in a ListView control.
ListViewItem.ListViewSubItem	Represents a subitem of a ListViewItem.
ListViewItem.ListViewSubItemCollection	Represents a collection of ListViewItem.ListViewSubItem objects stored in a ListViewItem.
ListViewItemConverter	Provides a type converter to convert ListViewItem objects to and from various other representations.
ListViewItemMouseHoverEventArgs	Provides data for the ItemMouseHover event.
ListViewItemSelectionChangedEventArgs	Provides data for the ItemSelectionChanged event.
ListViewItemStateImageIndexConverter	Provides a type converter to convert state image index values from one data type to another.
ListViewVirtualItemsSelectionRangeChangedEventArgs	Provides data for the VirtualItemsSelectionRangeChanged event.
MaskedTextBox	Uses a mask to distinguish between proper and improper user input.
MaskInputRejectedEventArgs	Provides data for the MaskInputRejected event.
MdiClient	Represents the container for multiple-document interface (MDI) child forms. This class cannot be inherited.
MdiClient.ControlCollection	Contains a collection of MdiClient controls.
MeasureItemEventArgs	Provides data for the MeasureItem event of the ListBox, ComboBox, CheckedListBox, and MenuItem controls.
MenuStrip	Provides a menu system for a form.
MessageBox	Displays a message window, also known as a dialog box, which presents a message to the user. It is a modal window, blocking other actions in the application until the user closes it. A MessageBox can contain text, buttons, and symbols that inform and instruct the user.
MonthCalendar	Represents a Windows control that enables the user to select a date using a visual monthly calendar display.
MonthCalendar.HitTestInfo	Contains information about an area of a MonthCalendar control. This class cannot be inherited.
MouseEventArgs	Provides data for the MouseUp, MouseDown, and MouseMove events.
NativeWindow	Provides a low-level encapsulation of a window handle and a window procedure.
NavigateEventArgs	Provides data for the Navigate event.
NodeLabelEditEventArgs	Provides data for the BeforeLabelEdit and AfterLabelEdit events.
NotifyIcon	Specifies a component that creates an icon in the notification area. This class cannot be inherited.
NumericUpDown	Represents a Windows spin box (also known as an up-down control) that displays numeric values.
NumericUpDownAcceleration	Provides information specifying how acceleration should be performed on a spin box (also known as an up-down control) when the up or down button is pressed for specified time period.
NumericUpDownAccelerationCollection	Represents a sorted collection of NumericUpDownAcceleration objects in the NumericUpDown control.
OpacityConverter	Provides a type converter to convert opacity values to and from a string.
OpenFileDialog	Displays a standard dialog box that prompts the user to open a file. This class cannot be inherited.
OSFeature	Provides operating-system specific feature queries.
OwnerDrawPropertyBag	Contains values of properties that a component might need only occasionally.
PaddingConverter	Provides a type converter to convert Padding values to and from various other representations.
PageSetupDialog	Enables users to change page-related print settings, including margins and paper orientation. This class cannot be inherited.
PaintEventArgs	Provides data for the Paint event.
Panel	Used to group collections of controls.
PictureBox	Represents a Windows picture box control for displaying an image.
PopupEventArgs	Provides data for the Popup event.
PowerStatus	Indicates current system power status information.
PreviewKeyDownEventArgs	Provides data for the PreviewKeyDown event.
PrintControllerWithStatusDialog	Controls how a document is printed from a Windows Forms application.
PrintDialog	Lets users select a printer and choose which sections of the document to print from a Windows Forms application.
PrintPreviewControl	Represents the raw preview part of print previewing from a Windows Forms application, without any dialog boxes or buttons. Most PrintPreviewControl objects are found on PrintPreviewDialog objects, but they do not have to be.
PrintPreviewDialog	Represents a dialog box form that contains a PrintPreviewControl for printing from a Windows Forms application.
ProfessionalColors	Provides Color structures that are colors of a Windows display element. This class cannot be inherited.
ProfessionalColorTable	Provides colors used for Microsoft Office display elements.
ProgressBar	Represents a Windows progress bar control.
ProgressBarRenderer	Provides methods used to render a progress bar control with visual styles. This class cannot be inherited.
PropertyGrid	Provides a user interface for browsing the properties of an object.
PropertyGrid.PropertyTabCollection	Contains a collection of PropertyTab objects.
PropertyManager	Maintains a Binding between an object's property and a data-bound control property.
PropertyTabChangedEventArgs	Provides data for the PropertyTabChanged event of a PropertyGrid.
PropertyValueChangedEventArgs	Provides data for the PropertyValueChanged event of a PropertyGrid.
QueryAccessibilityHelpEventArgs	Provides data for the QueryAccessibilityHelp event.
QueryContinueDragEventArgs	Provides data for the QueryContinueDrag event.
QuestionEventArgs	Provides data for events that need a true or false answer to a question.
RadioButton	Enables the user to select a single option from a group of choices when paired with other RadioButton controls.
RadioButton.RadioButtonAccessibleObject	Provides information about the RadioButton control to accessibility client applications.
RadioButtonRenderer	Provides methods used to render an option button control (also known as a radio button) with or without visual styles. This class cannot be inherited.
RelatedImageListAttribute	Indicates which ImageList a property is related to.
RetrieveVirtualItemEventArgs	Provides data for the RetrieveVirtualItem event.
RichTextBox	Represents a Windows rich text box control.
RowStyle	Represents the look and feel of a row in a table layout.
SaveFileDialog	Prompts the user to select a location for saving a file. This class cannot be inherited.
Screen	Represents a display device or multiple display devices on a single system.
ScrollableControl	Defines a base class for controls that support auto-scrolling behavior.
ScrollableControl.DockPaddingEdges	Determines the border padding for docked controls.
ScrollableControl.DockPaddingEdgesConverter	A TypeConverter for the ScrollableControl.DockPaddingEdges class.
ScrollBar	Implements the basic functionality of a scroll bar control.
ScrollBarRenderer	Provides methods used to render a scroll bar control with visual styles. This class cannot be inherited.
ScrollEventArgs	Provides data for the Scroll event.
ScrollProperties	Encapsulates properties related to scrolling.
SearchForVirtualItemEventArgs	Provides data for the SearchForVirtualItem event.
SelectedGridItemChangedEventArgs	Provides data for the SelectedGridItemChanged event of the PropertyGrid control.
SelectionRange	Represents a date selection range in a month calendar control.
SelectionRangeConverter	Provides a type converter to convert SelectionRange objects to and from various other types.
SendKeys	Provides methods for sending keystrokes to an application.
SplitContainer	Represents a control consisting of a movable bar that divides a container's display area into two resizable panels.
Splitter	Represents a splitter control that enables the user to resize docked controls. Splitter has been replaced by SplitContainer and is provided only for compatibility with previous versions.
SplitterCancelEventArgs	Provides data for splitter events.
SplitterEventArgs	Provides data for SplitterMoving and the SplitterMoved events.
SplitterPanel	Creates a panel that is associated with a SplitContainer.
StatusStrip	Represents a Windows status bar control.
SystemInformation	Provides information about the current system environment.
TabControl	Manages a related set of tab pages.
TabControl.ControlCollection	Contains a collection of Control objects.
TabControl.TabPageCollection	Contains a collection of TabPage objects.
TabControlCancelEventArgs	Provides data for the Selecting and Deselecting events of a TabControl control.
TabControlEventArgs	Provides data for the Selected and Deselected events of a TabControl control.
TableLayoutCellPaintEventArgs	Provides data for the CellPaint event.
TableLayoutColumnStyleCollection	A collection that stores ColumnStyle objects.
TableLayoutControlCollection	Represents a collection of child controls in a table layout container.
TableLayoutPanel	Represents a panel that dynamically lays out its contents in a grid composed of rows and columns.
TableLayoutRowStyleCollection	A collection that stores RowStyle objects.
TableLayoutSettings	Collects the characteristics associated with table layouts.
TableLayoutStyle	Implements the basic functionality that represents the appearance and behavior of a table layout.
TableLayoutStyleCollection	Implements the basic functionality for a collection of table layout styles.
TabPage	Represents a single tab page in a TabControl.
TabPage.TabPageControlCollection	Contains the collection of controls that the TabPage uses.
TabRenderer	Provides methods used to render a tab control with visual styles. This class cannot be inherited.
TaskDialog	A task dialog allows to display information and get simple input from the user. It is similar to a MessageBox (in that it is formatted by the operating system) but provides a lot more features.
TaskDialogButton	Represents a button control of a task dialog.
TaskDialogButtonCollection	Represents a collection of TaskDialogButton objects.
TaskDialogCommandLinkButton	Represents a command link button control of a task dialog.
TaskDialogControl	Represents a control of a task dialog.
TaskDialogExpander	Represents an expander button and the associated expanded area of a task dialog.
TaskDialogFootnote	Represents the footnote area of a task dialog.
TaskDialogIcon	Represents an icon that can be shown in the main area of a task dialog (by setting the Icon property) or in the footnote of a task dialog (by setting the Icon property).
TaskDialogLinkClickedEventArgs	Provides data for the LinkClicked event.
TaskDialogPage	Represents a page of content of a task dialog.
TaskDialogProgressBar	Represents a progress bar control of a task dialog.
TaskDialogRadioButton	Represents a radio button control of a task dialog.
TaskDialogRadioButtonCollection	Represents a collection of TaskDialogRadioButton objects.
TaskDialogVerificationCheckBox	Represents a verification checkbox control of a task dialog.
TextBox	Represents a Windows text box control.
TextBoxBase	Implements the basic functionality required by text controls.
TextBoxRenderer	Provides methods used to render a text box control with visual styles. This class cannot be inherited.
TextRenderer	Provides methods used to measure and render text. This class cannot be inherited.
ThreadExceptionDialog	Implements a dialog box that is displayed when an unhandled exception occurs in a thread.
Timer	Implements a timer that raises an event at user-defined intervals. This timer is optimized for use in Windows Forms applications and must be used in a window.
ToolStrip	Provides a container for Windows toolbar objects.
ToolStrip.ToolStripAccessibleObject	Provides information that accessibility applications use to adjust the user interface of a ToolStrip for users with impairments.
ToolStripArrowRenderEventArgs	Provides data for the RenderArrow event.
ToolStripButton	Represents a selectable ToolStripItem that can contain text and images.
ToolStripComboBox	Represents a ToolStripComboBox that is properly rendered in a ToolStrip.
ToolStripContainer	Provides panels on each side of the form and a central panel that can hold one or more controls.
ToolStripContentPanel	Represents the center panel of a ToolStripContainer control.
ToolStripContentPanelRenderEventArgs	Provides data for the RendererChanged event.
ToolStripControlHost	Hosts custom controls or Windows Forms controls.
ToolStripControlHost.ToolStripHostedControlAccessibleObject	Represents the accessible object control host responsible for accessible navigation within the ToolStrip standard items and hosted controls like TextBox, ComboBox, ProgressBar, etc.
ToolStripDropDown	Represents a control that allows the user to select a single item from a list that's displayed when the user clicks a ToolStripDropDownButton.
ToolStripDropDown.ToolStripDropDownAccessibleObject	Provides information about the ToolStripDropDown control to accessibility client applications.
ToolStripDropDownButton	Represents a control that when clicked displays an associated ToolStripDropDown from which the user can select a single item.
ToolStripDropDownClosedEventArgs	Provides data for the Closed event.
ToolStripDropDownClosingEventArgs	Provides data for the Closing event.
ToolStripDropDownItem	Provides basic functionality for controls that display a ToolStripDropDown when a ToolStripDropDownButton, ToolStripMenuItem, or ToolStripSplitButton control is clicked.
ToolStripDropDownItemAccessibleObject	Provides information that accessibility applications use to adjust the user interface of a ToolStripDropDown for users with impairments.
ToolStripDropDownMenu	Provides basic functionality for the ContextMenuStrip control.
ToolStripGripRenderEventArgs	Provides data for the RenderGrip event.
ToolStripItem	Represents the abstract base class that manages events and layout for all the elements that a ToolStrip or ToolStripDropDown can contain.
ToolStripItem.ToolStripItemAccessibleObject	Provides information that accessibility applications use to adjust the user interface of a ToolStripItem for users with impairments.
ToolStripItemClickedEventArgs	Provides data for the ItemClicked event.
ToolStripItemCollection	Represents a collection of ToolStripItem objects.
ToolStripItemEventArgs	Provides data for ToolStripItem events.
ToolStripItemImageRenderEventArgs	Provides data for the RenderItemImage event.
ToolStripItemRenderEventArgs	Provides data for the events that render the background of objects derived from ToolStripItem in the ToolStripRenderer class.
ToolStripItemTextRenderEventArgs	Provides data for the RenderItemText event.
ToolStripLabel	Represents a nonselectable ToolStripItem that renders text and images and can display hyperlinks.
ToolStripManager	Controls ToolStrip rendering and rafting, and the merging of MenuStrip, ToolStripDropDownMenu, and ToolStripMenuItem objects. This class cannot be inherited.
ToolStripMenuItem	Represents a selectable option displayed on a MenuStrip or ContextMenuStrip.
ToolStripOverflow	Manages the overflow behavior of a ToolStrip.
ToolStripOverflowButton	Hosts a ToolStripDropDown that displays items that overflow the ToolStrip.
ToolStripPanel	Creates a container within which other controls can share horizontal or vertical space.
ToolStripPanel.ToolStripPanelRowCollection	Represents all the ToolStripPanelRow objects in a ToolStripPanel.
ToolStripPanelRenderEventArgs	Provides data for ToolStripPanel drawing.
ToolStripPanelRow	Represents a row of a ToolStripPanel that can contain controls.
ToolStripProfessionalRenderer	Handles the painting functionality for ToolStrip objects, applying a custom palette and a streamlined style.
ToolStripProgressBar	Represents a Windows progress bar control contained in a StatusStrip.
ToolStripRenderer	Handles the painting functionality for ToolStrip objects.
ToolStripRenderEventArgs	Provides data for the OnRenderImageMargin(ToolStripRenderEventArgs), OnRenderToolStripBorder(ToolStripRenderEventArgs), and OnRenderToolStripBackground(ToolStripRenderEventArgs) methods.
ToolStripSeparator	Represents a line used to group items of a ToolStrip or the drop-down items of a MenuStrip or ContextMenuStrip or other ToolStripDropDown control.
ToolStripSeparatorRenderEventArgs	Provides data for the RenderGrip event.
ToolStripSplitButton	Represents a combination of a standard button on the left and a drop-down button on the right, or the other way around if the value of RightToLeft is Yes.
ToolStripSplitButton.ToolStripSplitButtonAccessibleObject	Provides information that accessibility applications use to adjust the user interface of a ToolStripSplitButton for users with impairments.
ToolStripStatusLabel	Represents a panel in a StatusStrip control.
ToolStripSystemRenderer	Handles the painting functionality for ToolStrip objects, using system colors and a flat visual style.
ToolStripTextBox	Represents a text box in a ToolStrip that allows the user to enter text.
ToolTip	Represents a small rectangular pop-up window that displays a brief description of a control's purpose when the user rests the pointer on the control.
TrackBar	Represents a standard Windows track bar.
TrackBarRenderer	Provides methods used to render a track bar control with visual styles. This class cannot be inherited.
TreeNode	Represents a node of a TreeView.
TreeNodeCollection	Represents a collection of TreeNode objects.
TreeNodeConverter	Provides a type converter to convert TreeNode objects to and from various other representations.
TreeNodeMouseClickEventArgs	Provides data for the NodeMouseClick and NodeMouseDoubleClick events.
TreeNodeMouseHoverEventArgs	Provides data for the NodeMouseHover event.
TreeView	Displays a hierarchical collection of labeled items, each represented by a TreeNode.
TreeViewCancelEventArgs	Provides data for the BeforeCheck, BeforeCollapse, BeforeExpand, and BeforeSelect events of a TreeView control.
TreeViewEventArgs	Provides data for the AfterCheck, AfterCollapse, AfterExpand, or AfterSelect events of a TreeView control.
TreeViewHitTestInfo	Contains information about an area of a TreeView control or a TreeNode.
TreeViewImageIndexConverter	Provides a type converter to convert data for an image index to and from one data type to another for use by the TreeView control.
TreeViewImageKeyConverter	Provides a type converter to convert data for an image key to and from another data type.
TypeValidationEventArgs	Provides data for the TypeValidationCompleted event.
UICuesEventArgs	Provides data for the ChangeUICues event.
UpDownBase	Implements the basic functionality required by a spin box (also known as an up-down control).
UpDownEventArgs	Provides data for controls that derive from the UpDownBase control.
UserControl	Provides an empty control that can be used to create other controls.
VScrollBar	Represents a standard Windows vertical scroll bar.
VScrollProperties	Provides basic properties for the VScrollBar class.
WebBrowser	Enables a user to navigate Web pages inside a form.
WebBrowser.WebBrowserSite	Represents the host window of a WebBrowser control.
WebBrowserBase	Provides a wrapper for a generic ActiveX control for use as a base class by the WebBrowser control.
WebBrowserDocumentCompletedEventArgs	Provides data for the DocumentCompleted event.
WebBrowserNavigatedEventArgs	Provides data for the Navigated event.
WebBrowserNavigatingEventArgs	Provides data for the Navigating event.
WebBrowserProgressChangedEventArgs	Provides data for the ProgressChanged event.
WebBrowserSiteBase	Implements the interfaces of an ActiveX site for use as a base class by the WebBrowser.WebBrowserSite class.
WindowsFormsSection	Defines a new ConfigurationSection for parsing application settings. This class cannot be inherited.
WindowsFormsSynchronizationContext	Provides a synchronization context for the Windows Forms application model.

Structs

BindingMemberInfo	Contains information that enables a Binding to resolve a data binding to either the property of an object or the property of the current object in a list of objects.
ImeModeConversion	Helper class that provides information about the IME conversion mode.
LinkArea	Represents an area within a LinkLabel control that represents a hyperlink within the control.
Message	Implements a Windows message.
Padding	Represents padding or margin information associated with a user interface (UI) element.
TableLayoutPanelCellPosition	Represents a cell in a TableLayoutPanel.

Interfaces

IBindableComponent	Enables a non-control component to emulate the data-binding behavior of a Windows Forms control.
IButtonControl	Allows a control to act like a button on a form.
ICommandExecutor	Defines a method that executes a certain action on the type that implements this interface.
IComponentEditorPageSite	The site for a ComponentEditorPage.
IContainerControl	Provides the functionality for a control to act as a parent for other controls.
ICurrencyManagerProvider	Provides custom binding management for components.
IDataGridColumnStyleEditingNotificationService	Provides an editing notification interface.
IDataGridViewEditingCell	Defines common functionality for a cell that allows the manipulation of its value.
IDataGridViewEditingControl	Defines common functionality for controls that are hosted within cells of a DataGridView.
IDataObject	Provides a format-independent mechanism for transferring data.
IDropTarget	Defines mouse events.
IFeatureSupport	Specifies a standard interface for retrieving feature information from the current system.
IFileReaderService	Defines a method that opens a file from the current directory.
IMessageFilter	Defines a message filter interface.
IWin32Window	Provides an interface to expose Win32 HWND handles.
IWindowTarget	Defines the communication layer between a control and the Windows API.

Enums

AccessibleEvents	Specifies events that are reported by accessible applications.
AccessibleNavigation	Specifies values for navigating among accessible objects.
AccessibleRole	Specifies values representing possible roles for an accessible object.
AccessibleSelection	Specifies how an accessible object is selected or receives focus.
AccessibleStates	Specifies values representing possible states for an accessible object.
AnchorStyles	Specifies how a control anchors to the edges of its container.
Appearance	Specifies the appearance of a control.
ArrangeDirection	Specifies the direction in which the system arranges minimized windows.
ArrangeStartingPosition	Specifies the starting position that the system uses to arrange minimized windows.
ArrowDirection	Specifies the direction to move when getting items with the GetNextItem(ToolStripItem, ArrowDirection) method.
AutoCompleteMode	Specifies the mode for the automatic completion feature used in the ComboBox and TextBox controls.
AutoCompleteSource	Specifies the source for ComboBox and TextBox automatic completion functionality.
AutoScaleMode	Specifies the different types of automatic scaling modes supported by Windows Forms.
AutoSizeMode	Specifies how a control will behave when its AutoSize property is enabled.
AutoValidate	Determines how a control validates its data when it loses user input focus.
AxHost.ActiveXInvokeKind	Specifies the type of member that referenced the ActiveX control while it was in an invalid state.
BatteryChargeStatus	Defines identifiers that indicate the current battery charge level or charging state information.
BindingCompleteContext	Specifies the direction of the binding operation.
BindingCompleteState	Indicates the result of a completed binding operation.
BootMode	Specifies the boot mode in which the system was started.
Border3DSide	Specifies the sides of a rectangle to apply a three-dimensional border to.
Border3DStyle	Specifies the style of a three-dimensional border.
BorderStyle	Specifies the border style for a control.
BoundsSpecified	Specifies the bounds of the control to use when defining a control's size and position.
ButtonBorderStyle	Specifies the border style for a button control.
ButtonState	Specifies the appearance of a button.
CaptionButton	Specifies the type of caption button to display.
CharacterCasing	Specifies the case of characters in a TextBox control.
CheckState	Specifies the state of a control, such as a check box, that can be checked, unchecked, or set to an indeterminate state.
CloseReason	Specifies the reason that a form was closed.
ColorDepth	Specifies the number of colors used to display an image in an ImageList control.
ColumnHeaderAutoResizeStyle	Specifies how a column contained in a ListView should be resized.
ColumnHeaderStyle	Specifies the styles of the column headers in a ListView control.
ComboBoxStyle	Specifies the ComboBox style.
ControlStyles	Specifies the style and behavior of a control.
ControlUpdateMode	Determines when changes to a data source value get propagated to the corresponding data-bound control property.
DataGridViewAdvancedCellBorderStyle	Specifies the border styles that can be applied to the cells of a DataGridView control.
DataGridViewAutoSizeColumnMode	Defines values for specifying how the width of a column is adjusted.
DataGridViewAutoSizeColumnsMode	Defines values for specifying how the widths of columns are adjusted.
DataGridViewAutoSizeRowMode	Defines values for specifying how the height of a row is adjusted.
DataGridViewAutoSizeRowsMode	Defines values for specifying how the heights of rows are adjusted.
DataGridViewCellBorderStyle	Specifies the border styles that can be applied to the cells of a DataGridView control.
DataGridViewCellStyleScopes	Specifies the DataGridView entity that owns the cell style that was changed.
DataGridViewClipboardCopyMode	Defines constants that indicate whether content is copied from a DataGridView control to the Clipboard.
DataGridViewColumnHeadersHeightSizeMode	Defines values for specifying how the height of the column headers is adjusted.
DataGridViewColumnSortMode	Defines how a DataGridView column can be sorted by the user.
DataGridViewComboBoxDisplayStyle	Defines constants that indicate how a DataGridViewComboBoxCell is displayed.
DataGridViewContentAlignment	Defines constants that indicate the alignment of content within a DataGridView cell.
DataGridViewDataErrorContexts	Represents the state of a data-bound DataGridView control when a data error occurred.
DataGridViewEditMode	Specifies how a user starts cell editing in the DataGridView control.
DataGridViewElementStates	Specifies the user interface (UI) state of a element within a DataGridView control.
DataGridViewHeaderBorderStyle	Specifies the border style that can be applied to the ColumnHeadersBorderStyle and RowHeadersBorderStyle properties of a DataGridView control.
DataGridViewHitTestType	Specifies a location in a DataGridView control.
DataGridViewImageCellLayout	Specifies the layout for an image contained in a DataGridViewCell.
DataGridViewPaintParts	Defines values for specifying the parts of a DataGridViewCell that are to be painted.
DataGridViewRowHeadersWidthSizeMode	Defines values for specifying how the row header width is adjusted.
DataGridViewSelectionMode	Describes how cells of a DataGridView control can be selected.
DataGridViewTriState	Defines values for specifying one of three possible states.
DataSourceUpdateMode	Specifies when a data source is updated when changes occur in the bound control.
DateTimePickerFormat	Specifies the date and time format the DateTimePicker control displays.
Day	Specifies the day of the week.
DialogResult	Specifies identifiers to indicate the return value of a dialog box.
DockingBehavior	Specifies how a control should be docked by default when added through a designer.
DockStyle	Specifies the position and manner in which a control is docked.
DragAction	Specifies how and if a drag-and-drop operation should continue.
DragDropEffects	Specifies the possible effects of a drag-and-drop operation.
DrawItemState	Specifies the state of an item that is being drawn.
DrawMode	Specifies how the elements of a control are drawn.
DropImageType	Specifies the drop description image type.
ErrorBlinkStyle	Specifies constants indicating when the error icon, supplied by an ErrorProvider, should blink to alert the user that an error has occurred.
ErrorIconAlignment	Specifies constants indicating the locations that an error icon can appear in relation to the control with an error.
FixedPanel	Specifies that Panel1, Panel2, or neither panel is fixed.
FlatStyle	Specifies the appearance of a control.
FlowDirection	Defines constants that specify the direction in which consecutive user interface (UI) elements are placed in a linear layout container.
FormBorderStyle	Specifies the border styles for a form.
FormStartPosition	Specifies the initial position of a form.
FormWindowState	Specifies how a form window is displayed.
FrameStyle	Specifies the frame style of the selected control.
GetChildAtPointSkip	Specifies which child controls to skip.
GridItemType	Specifies the valid grid item types for a PropertyGrid.
HelpNavigator	Specifies constants indicating which elements of the Help file to display.
HighDpiMode	Specifies the different high DPI modes that can be applied to an application.
HorizontalAlignment	Specifies how an object or text in a control is horizontally aligned relative to an element of the control.
HtmlElementInsertionOrientation	Defines values that describe where to insert a new element when using InsertAdjacentElement(HtmlElementInsertionOrientation, HtmlElement).
ImageLayout	Specifies the position of the image on the control.
ImeMode	Specifies a value that determines the Input Method Editor (IME) status of an object when the object is selected.
InsertKeyMode	Represents the insertion mode used by text boxes.
ItemActivation	Specifies the user action that is required to activate items in a list view control and the feedback that is given as the user moves the mouse pointer over an item.
ItemBoundsPortion	Specifies a portion of the list view item from which to retrieve the bounding rectangle.
Keys	Specifies key codes and modifiers.
LeftRightAlignment	Specifies whether an object or text is aligned to the left or right of a reference point.
LinkBehavior	Specifies the behaviors of a link in a LinkLabel.
LinkState	Specifies constants that define the state of the link.
ListViewAlignment	Specifies how items align in the ListView.
ListViewGroupCollapsedState	Specifies the appearance of a ListViewGroup.
ListViewHitTestLocations	Defines constants that represent areas in a ListView or ListViewItem.
ListViewItemStates	Defines constants that represent the possible states of a ListViewItem.
MaskFormat	Defines how to format the text inside of a MaskedTextBox.
MdiLayout	Specifies the layout of multiple document interface (MDI) child windows in an MDI parent window.
MenuGlyph	Specifies the image to draw when drawing a menu with the DrawMenuGlyph(Graphics, Rectangle, MenuGlyph) method.
MergeAction	Specifies the kind of action to take if a match is found when combining menu items on a ToolStrip.
MessageBoxButtons	Specifies constants defining which buttons to display on a MessageBox.
MessageBoxDefaultButton	Specifies constants defining the default button on a MessageBox.
MessageBoxIcon	Specifies constants defining which information to display.
MessageBoxOptions	Specifies options on a MessageBox.
MonthCalendar.HitArea	Defines constants that represent areas in a MonthCalendar control.
MouseButtons	Specifies constants that define which mouse button was pressed.
Orientation	Specifies the orientation of controls or elements of controls.
PictureBoxSizeMode	Specifies how an image is positioned within a PictureBox.
PowerLineStatus	Specifies the system power status.
PowerState	Defines identifiers that indicate a suspended system power activity mode.
PreProcessControlState	Provides options that specify the relationship between the control and preprocessing messages.
ProgressBarStyle	Specifies the style that a ProgressBar uses to indicate the progress of an operation.
PropertySort	Specifies how properties are sorted in the PropertyGrid.
RichTextBoxFinds	Specifies how a text search is carried out in a RichTextBox control.
RichTextBoxLanguageOptions	Provides RichTextBox settings for Input Method Editor (IME) and Asian language support.
RichTextBoxScrollBars	Specifies the type of scroll bars to display in a RichTextBox control.
RichTextBoxSelectionAttribute	Specifies whether any characters in the current selection have the style or attribute.
RichTextBoxSelectionTypes	Specifies the type of selection in a RichTextBox control.
RichTextBoxStreamType	Specifies the types of input and output streams used to load and save data in the RichTextBox control.
RichTextBoxWordPunctuations	Specifies the types of punctuation tables that can be used with the RichTextBox control's word-wrapping and word-breaking features.
RightToLeft	Specifies a value indicating whether the text appears from right to left, such as when using Hebrew or Arabic fonts.
ScreenOrientation	Specifies the angle of the screen.
ScrollBars	Specifies which scroll bars will be visible on a control.
ScrollButton	Specifies the type of scroll arrow to draw on a scroll bar.
ScrollEventType	Specifies the type of action used to raise the Scroll event.
ScrollOrientation	Specifies the scroll bar orientation for the Scroll event.
SearchDirectionHint	Provides a directional hint of where to search for a ListViewItem.
SecurityIDType	This enumeration is not used.
SelectionMode	Specifies the selection behavior of a list box.
Shortcut	Specifies shortcut keys that can be used by menu items.
SizeGripStyle	Specifies the style of the sizing grip on a Form.
SizeType	Specifies how rows or columns of user interface (UI) elements should be sized relative to their container.
SortOrder	Specifies how items in a list are sorted.
StructFormat	This enumeration is not used.
SystemParameter	Specifies the system parameter type.
TabAlignment	Specifies the locations of the tabs in a tab control.
TabAppearance	Specifies the appearance of the tabs in a tab control.
TabControlAction	Defines values representing TabControl events.
TabDrawMode	Specifies whether the tabs in a tab control are owner-drawn (drawn by the parent window), or drawn by the operating system.
TableLayoutPanelCellBorderStyle	Specifies the border style of a cell in a table layout control.
TableLayoutPanelGrowStyle	Specifies how a TableLayoutPanel will gain additional rows or columns after its existing cells are full.
TabSizeMode	Specifies how tabs in a tab control are sized.
TaskDialogExpanderPosition	Specifies where the expanded area of the task dialog is to be displayed.
TaskDialogProgressBarState	Contains constants that specify the state of a task dialog progress bar.
TaskDialogStartupLocation	Specifies the position that a task dialog will be shown in when it is first opened.
TextDataFormat	Specifies the formats used with text-related methods of the Clipboard and DataObject classes.
TextFormatFlags	Specifies the display and layout information for text strings.
TextImageRelation	Specifies the position of the text and image relative to each other on a control.
TickStyle	Specifies the location of tick marks in a TrackBar control.
ToolStripDropDownCloseReason	Specifies the reason that a ToolStripDropDown control was closed.
ToolStripDropDownDirection	Specifies the direction in which a ToolStripDropDown control is displayed relative to its parent control.
ToolStripGripDisplayStyle	Specifies the orientation of the ToolStrip move handle (grip).
ToolStripGripStyle	Specifies visibility of a ToolStrip move handle (grip).
ToolStripItemAlignment	Determines the alignment of a ToolStripItem in a ToolStrip.
ToolStripItemDisplayStyle	Specifies what to render (image or text) for this ToolStripItem.
ToolStripItemImageScaling	Specifies whether the size of the image on a ToolStripItem is automatically adjusted to fit on a ToolStrip while retaining the original image proportions.
ToolStripItemOverflow	Determines whether a ToolStripItem is placed in the overflow ToolStrip.
ToolStripItemPlacement	Specifies where a ToolStripItem is to be layed out.
ToolStripLayoutStyle	Specifies the possible alignments with which the items of a ToolStrip can be displayed.
ToolStripManagerRenderMode	Specifies the painting style applied to multiple ToolStrip objects contained in a form.
ToolStripRenderMode	Specifies the painting style applied to one ToolStrip contained in a form.
ToolStripStatusLabelBorderSides	Specifies which sides of a ToolStripStatusLabel have borders.
ToolStripTextDirection	Specifies the text orientation to use with a particular LayoutStyle.
ToolTipIcon	Defines a set of standardized icons that can be associated with a ToolTip.
TreeNodeStates	Defines constants that represent the possible states of a TreeNode.
TreeViewAction	Specifies the action that raised a TreeViewEventArgs event.
TreeViewDrawMode	Defines constants that represent the ways a TreeView can be drawn.
TreeViewHitTestLocations	Defines constants that represent areas of a TreeView or TreeNode.
UICues	Specifies the state of the user interface.
UnhandledExceptionMode	Defines where a Windows Forms application should send unhandled exceptions.
ValidationConstraints	Defines constants that inform ValidateChildren(ValidationConstraints) about how it should validate a container's child controls.
View	Specifies how list items are displayed in a ListView control.
WebBrowserEncryptionLevel	Specifies constants that define the encryption methods used by documents displayed in the WebBrowser control.
WebBrowserReadyState	Specifies constants that define the state of the WebBrowser control.
WebBrowserRefreshOption	Specifies constants that define how the WebBrowser control can refresh its contents.

Delegates

Application.MessageLoopCallback	Represents a method that will check whether the hosting environment is still sending messages.
AxHost.AboutBoxDelegate	Represents the method that will display an ActiveX control's About dialog box.
BindingCompleteEventHandler	Represents the method that will handle the BindingComplete event in data-binding scenarios.
BindingManagerDataErrorEventHandler	Represents the method that will handle the DataError event of a BindingManagerBase.
CacheVirtualItemsEventHandler	Represents the method that will handle the CacheVirtualItems event of a ListView.
ColumnClickEventHandler	Represents the method that will handle the ColumnClick event of a ListView.
ColumnReorderedEventHandler	Represents the method that will handle the ColumnReordered event of the ListView control.
ColumnWidthChangedEventHandler	Represents the method that will handle the ColumnWidthChanged event of a ListView.
ColumnWidthChangingEventHandler	Represents the method that will handle the ColumnWidthChanging event of a ListView.
ContentsResizedEventHandler	Represents the method that will handle the ContentsResized event of a RichTextBox.
ControlEventHandler	Represents the method that will handle the ControlAdded and ControlRemoved events of the Control class.
ConvertEventHandler	Represents the method that will handle the Parse and Format events of a Binding.
DataGridViewAutoSizeColumnModeEventHandler	Represents the method that will handle the AutoSizeColumnModeChanged event of a DataGridView control.
DataGridViewAutoSizeColumnsModeEventHandler	Represents the method that will handle the AutoSizeColumnsModeChanged event of a DataGridView control.
DataGridViewAutoSizeModeEventHandler	Represents the method that will handle the AutoSizeRowsModeChanged or RowHeadersWidthSizeModeChanged events of a DataGridView.
DataGridViewBindingCompleteEventHandler	Represents the method that will handle the DataBindingComplete event of a DataGridView.
DataGridViewCellCancelEventHandler	Represents the method that will handle the CellBeginEdit and RowValidating events of a DataGridView.
DataGridViewCellContextMenuStripNeededEventHandler	Represents the method that will handle a CellContextMenuStripNeeded event of a DataGridView.
DataGridViewCellErrorTextNeededEventHandler	Represents the method that will handle the CellErrorTextNeeded event of a DataGridView.
DataGridViewCellEventHandler	Represents the method that will handle DataGridView events related to cell and row operations.
DataGridViewCellFormattingEventHandler	Represents the method that will handle the CellFormatting event of a DataGridView.
DataGridViewCellMouseEventHandler	Represents the method that will handle mouse-related events raised by a DataGridView.
DataGridViewCellPaintingEventHandler	Represents the method that will handle the CellPainting event of a DataGridView.
DataGridViewCellParsingEventHandler	Represents the method that will handle a CellParsing event of a DataGridView.
DataGridViewCellStateChangedEventHandler	Represents the method that will handle the CellStateChanged event of a DataGridView.
DataGridViewCellStyleContentChangedEventHandler	Represents the method that will handle the CellStyleContentChanged event of a DataGridView.
DataGridViewCellToolTipTextNeededEventHandler	Represents the method that will handle the CellToolTipTextNeeded event of a DataGridView.
DataGridViewCellValidatingEventHandler	Represents the method that will handle the CellValidating event of a DataGridView control.
DataGridViewCellValueEventHandler	Represents the method that will handle the CellValueNeeded event or CellValuePushed event of a DataGridView.
DataGridViewColumnDividerDoubleClickEventHandler	Represents the method that will handle the ColumnDividerDoubleClick event of a DataGridView.
DataGridViewColumnEventHandler	Represents the method that will handle column-related events of a DataGridView.
DataGridViewColumnStateChangedEventHandler	Represents the method that will handle the ColumnStateChanged event of a DataGridView.
DataGridViewDataErrorEventHandler	Represents the method that will handle the DataError event of a DataGridView.
DataGridViewEditingControlShowingEventHandler	Represents the method that will handle the EditingControlShowing event of a DataGridView.
DataGridViewRowCancelEventHandler	Represents the method that will handle the UserDeletingRow event of a DataGridView.
DataGridViewRowContextMenuStripNeededEventHandler	Represents the method that will handle the RowContextMenuStripNeeded event of a DataGridView.
DataGridViewRowDividerDoubleClickEventHandler	Represents the method that will handle the RowDividerDoubleClick event of a DataGridView.
DataGridViewRowErrorTextNeededEventHandler	Represents the method that will handle the RowErrorTextNeeded event of a DataGridView.
DataGridViewRowEventHandler	Represents the method that will handle row-related events of a DataGridView.
DataGridViewRowHeightInfoNeededEventHandler	Represents the method that will handle an RowHeightInfoNeeded event of a DataGridView control.
DataGridViewRowHeightInfoPushedEventHandler	Represents the method that will handle the RowHeightInfoPushed event of a DataGridView.
DataGridViewRowPostPaintEventHandler	Represents the method that will handle the RowPostPaint event of a DataGridView.
DataGridViewRowPrePaintEventHandler	Represents the method that will handle the RowPrePaint event of a DataGridView.
DataGridViewRowsAddedEventHandler	Represents the method that will handle the RowsAdded event of a DataGridView.
DataGridViewRowsRemovedEventHandler	Represents the method that will handle the RowsRemoved event of a DataGridView.
DataGridViewRowStateChangedEventHandler	Represents the method that will handle the RowStateChanged event of a DataGridView.
DataGridViewSortCompareEventHandler	Represents the method that will handle the SortCompare event of a DataGridView control.
DateBoldEventHandler	Represents the method that will handle an internal event of the MonthCalendar control.
DateRangeEventHandler	Represents the method that will handle the DateChanged or DateSelected event of a MonthCalendar.
DpiChangedEventHandler	Represents the method that will handle a DpiChanged event of a form or control.
DragEventHandler	Represents the method that will handle the DragDrop, DragEnter, or DragOver event of a Control.
DrawItemEventHandler	Represents the method that will handle the DrawItem event of a ComboBox, ListBox, MenuItem, or TabControl control.
DrawListViewColumnHeaderEventHandler	Represents the method that will handle the DrawColumnHeader event of a ListView.
DrawListViewItemEventHandler	Represents the method that will handle the DrawItem event of a ListView.
DrawListViewSubItemEventHandler	Represents the method that will handle the DrawSubItem event of a ListView.
DrawToolTipEventHandler	Represents the method that will handle the Draw event of a ToolTip.
DrawTreeNodeEventHandler	Represents the method that will handle the DrawNode event of a TreeView.
FormClosedEventHandler	Represents the method that handles a FormClosed event.
FormClosingEventHandler	Represents the method that handles a FormClosing event.
GiveFeedbackEventHandler	Represents the method that handles the GiveFeedback event of a Control.
HelpEventHandler	Represents the method that will handle the HelpRequested event of a Control.
HtmlElementErrorEventHandler	Represents the method that will handle the Error event of an HtmlWindow.
HtmlElementEventHandler	Represents the method that will handle the Click, MouseDown and related events on HtmlDocument, HtmlElement, and HtmlWindow.
InputLanguageChangedEventHandler	Represents the method that will handle the InputLanguageChanged event of a Form.
InputLanguageChangingEventHandler	Represents the method that will handle the InputLanguageChanging event of a Form.
InvalidateEventHandler	Represents the method that will handle the Invalidated event of a Control.
ItemChangedEventHandler	Represents the method that will handle the ItemChanged event of the CurrencyManager class.
ItemCheckedEventHandler	Represents the method that will handle the ItemChecked event of a ListView control.
ItemCheckEventHandler	Represents the method that will handle the ItemCheck event of a CheckedListBox or ListView control.
ItemDragEventHandler	Represents the method that will handle the ItemDrag event of a ListView or TreeView control.
KeyEventHandler	Represents the method that will handle the KeyUp or KeyDown event of a Control.
KeyPressEventHandler	Represents the method that will handle the KeyPress event of a Control.
LabelEditEventHandler	Represents the method that handles the BeforeLabelEdit and AfterLabelEdit events.
LayoutEventHandler	Represents the method that will handle the Layout event of a Control.
LinkClickedEventHandler	Represents the method that will handle the LinkClicked event of a RichTextBox.
LinkLabelLinkClickedEventHandler	Represents the method that will handle the LinkClicked event of a LinkLabel.
ListControlConvertEventHandler	Represents the method that will handle converting a ListControl.
ListViewItemMouseHoverEventHandler	Represents the method that will handle the ItemMouseHover event of a ListView.
ListViewItemSelectionChangedEventHandler	Represents the method that will handle the ItemSelectionChanged event of a ListView.
ListViewVirtualItemsSelectionRangeChangedEventHandler	Represents the method that will handle the VirtualItemsSelectionRangeChanged event of a ListView.
MaskInputRejectedEventHandler	Represents the method that will handle the MaskInputRejected event of a MaskedTextBox control.
MeasureItemEventHandler	Represents the method that will handle the MeasureItem event of the ListBox, ComboBox, CheckedListBox, or MenuItem controls.
MethodInvoker	Represents a delegate that can execute any method in managed code that is declared void and takes no parameters.
MouseEventHandler	Represents the method that will handle the MouseDown, MouseUp, or MouseMove event of a form, control, or other component.
NavigateEventHandler	Represents the method that will handle the NavigateEventArgs event of a DataGrid.
NodeLabelEditEventHandler	Represents the method that will handle the BeforeLabelEdit and AfterLabelEdit events of a TreeView control.
PaintEventHandler	Represents the method that will handle the Paint event of a Control.
PopupEventHandler	Represents the method that handles the Popup event of the ToolTip class.
PreviewKeyDownEventHandler	Represents the method that will handle the PreviewKeyDown event for a control.
PropertyTabChangedEventHandler	Represents the method that will handle the PropertyTabChanged event of a PropertyGrid.
PropertyValueChangedEventHandler	The event handler class that is invoked when a property in the grid is modified by the user.
QueryAccessibilityHelpEventHandler	Represents the method that will handle the QueryAccessibilityHelp event of a control.
QueryContinueDragEventHandler	Represents the method that will handle the QueryContinueDrag event of a Control.
QuestionEventHandler	Represents the method that will handle the CancelRowEdit event or the RowDirtyStateNeeded event of a DataGridView.
RetrieveVirtualItemEventHandler	Represents the method that will handle the RetrieveVirtualItem event of a ListView.
ScrollEventHandler	Represents the method that handles the Scroll event of a DataGridView or ScrollBar.
SearchForVirtualItemEventHandler	Represents the method that will handle the SearchForVirtualItem event of a ListView.
SelectedGridItemChangedEventHandler	Represents the method that will handle the SelectedGridItemChanged event of a PropertyGrid.
SplitterCancelEventHandler	Represents the method that will handle the SplitterMoving event of a Splitter.
SplitterEventHandler	Represents the method that will handle the SplitterMoving and SplitterMoved events of a Splitter.
TabControlCancelEventHandler	Represents the method that will handle the Selecting or Deselecting event of a TabControl control.
TabControlEventHandler	Represents the method that will handle the Selected or Deselected event of a TabControl control.
TableLayoutCellPaintEventHandler	Represents the method that will handle the CellPaint event.
ToolStripArrowRenderEventHandler	Represents the method that will handle the RenderArrow event of a ToolStripRenderer. This class cannot be inherited.
ToolStripContentPanelRenderEventHandler	Represents the method that will handle the RendererChanged event of a ToolStripContentPanel.
ToolStripDropDownClosedEventHandler	Represents the method that will handle the Closed event of a ToolStripDropDown.
ToolStripDropDownClosingEventHandler	Represents the method that handles the Closing event of a ToolStripDropDown.
ToolStripGripRenderEventHandler	Represents the method that will handle the RenderGrip event of a ToolStripRenderer.
ToolStripItemClickedEventHandler	Represents the method that will handle the ItemClicked event of a ToolStripItem.
ToolStripItemEventHandler	Represents the method that will handle events for a ToolStripItem.
ToolStripItemImageRenderEventHandler	Represents the method that will handle the RenderItemImage event or RenderItemCheck event of a ToolStripRenderer.
ToolStripItemRenderEventHandler	Represents the method that handles the events that render the background of objects derived from ToolStripItem in the ToolStripRenderer class.
ToolStripItemTextRenderEventHandler	Represents the method that will handle the RenderItemText event of a ToolStripRenderer.
ToolStripPanelRenderEventHandler	Represents the method that will handle ToolStripPanel paint events.
ToolStripRenderEventHandler	Represents the method that will handle the RenderToolStripBorder event or the RenderToolStripBackground event of a ToolStripRenderer.
ToolStripSeparatorRenderEventHandler	Represents the method that will handle the RenderSeparator event of a ToolStripRenderer class.
TreeNodeMouseClickEventHandler	Represents the method that will handle the NodeMouseClick and NodeMouseDoubleClick events of a TreeView.
TreeNodeMouseHoverEventHandler	Represents the method that will handle the NodeMouseHover event of a TreeView.
TreeViewCancelEventHandler	Represents the method that will handle the BeforeCheck, BeforeCollapse, BeforeExpand, or BeforeSelect event of a TreeView.
TreeViewEventHandler	Represents the method that will handle the AfterCheck, AfterCollapse, AfterExpand, or AfterSelect event of a TreeView.
TypeValidationEventHandler	Represents the method that will handle the TypeValidationCompleted event of the MaskedTextBox control.
UICuesEventHandler	Represents a method that will handle the ChangeUICues event of a Control.
UpDownEventHandler	Represents the method that will handle an event for an internal class.
WebBrowserDocumentCompletedEventHandler	Represents the method that will handle the DocumentCompleted event of a WebBrowser control.
WebBrowserNavigatedEventHandler	Represents the method that will handle the Navigated event of a WebBrowser control.
WebBrowserNavigatingEventHandler	Represents the method that will handle the Navigating event of a WebBrowser control.
WebBrowserProgressChangedEventHandler	Represents the method that will handle the ProgressChanged event of a WebBrowser control.

Remarks

The following table shows the classes in System.Windows.Forms namespace grouped into categories.

Class category	Details
- Control, User Control, and Form	Most classes within the System.Windows.Forms namespace derive from the Control class. The Control class provides the base functionality for all controls that are displayed on a Form. The Form class represents a window within an application. This includes dialog boxes, modeless windows, and Multiple Document Interface (MDI) client and parent windows. You can also create your own controls by deriving from the UserControl class.
- Menus and Toolbars	Windows Forms contains a rich set of classes for creating your own custom toolbars and menus with modern appearance and behavior (look and feel). ToolStrip, MenuStrip, ContextMenuStrip, and StatusStrip can be used to create toolbars, menu bars, context menus, and status bars, respectively.
- Controls	The System.Windows.Forms namespace provides a variety of control classes that you can use to create rich user interfaces. Some controls are designed for data entry within the application, such as TextBox and ComboBox controls. Other controls display application data, such as Label and ListView. The namespace also provides controls for invoking commands within the application, such as Button. The WebBrowser control and managed HTML classes, such as HtmlDocument, let you display and manipulate HTML pages within your managed Windows Forms application. The MaskedTextBox control is an advanced data entry control that lets you define masks that automatically accept or reject user input. Additionally, you can use the PropertyGrid control to create your own Windows Forms Designer that displays the designer-visible properties of the controls.
- Layout	Several important classes in Windows Forms help control the layout of controls on a display surface, such as a form or control. FlowLayoutPanel lays out all the controls it contains in a serial manner, and TableLayoutPanel lets you define cells and rows for laying out controls in a fixed grid. SplitContainer divides your display surface into two or more adjustable parts.
- Data and Data Binding	Windows Forms defines a rich architecture for binding to data sources such as databases and XML files. The DataGridView control provides a customizable table for displaying data, and lets you customize cells, rows, columns, and borders. The BindingNavigator control represents a standardized way to navigate and work with data on a form; BindingNavigator is frequently paired with the BindingSource control to move through data records on a form and interact with them.
- Components	Besides controls, the System.Windows.Forms namespace provides other classes that do not derive from the Control class but still provide visual features to a Windows-based application. Some classes, such as ToolTip and ErrorProvider, extend the capabilities or provide information to the user. With the Help and HelpProvider classes, you can display Help information to a user of your applications.
- Common Dialog Boxes	Windows provides several common dialog boxes that you can use to give your application a consistent user interface when performing tasks such as opening and saving files, manipulating the font or text color, or printing. The OpenFileDialog and SaveFileDialog classes provide the functionality to display a dialog box that lets the user locate and enter the name of a file to open or save. The FontDialog class displays a dialog box to change elements of the Font used by your application. The PageSetupDialog, PrintPreviewDialog, and PrintDialog classes display dialog boxes that enable the user to control aspects of printing documents. For more information about printing from a Windows-based application, see the System.Drawing.Printing namespace. Besides the common dialog boxes, the System.Windows.Forms namespace provides the MessageBox class for displaying a message box that can display and retrieve data from the user.

There are several classes within the System.Windows.Forms namespace that provide support to the classes mentioned in the previous summary. Examples of the supporting classes are enumerations, event argument classes, and delegates used by events within controls and components.

Caution

Classes within the Windows Forms namespace are not supported for use within a Windows service. Trying to use these classes from within a service may produce unexpected problems, such as diminished service performance and run-time exceptions.

If you are using .NET Framework version 1.1 or .NET Framework 1.0 and you must make your Windows Forms application support Windows XP visual styles, make sure that you set the FlatStyle property of your controls to FlatStyle.System and include a manifest with your executable file. A manifest is an XML file that is included either as a resource within your application executable file or as a separate file that resides in the same directory as the executable file. For an example of a manifest, see the Example section for the FlatStyle enumeration. By default visual styles are enabled for the .NET Framework versions 1.1, 1.2, and 2.0.