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AFX Messages

These messages are used in MFC.

Messages

The following table lists messages that are used in the MFC library:

Message

Description

[in] wParam

lParam (All parameters are [in] unless otherwise stated.)

Return Value

AFX_WM_ACCGETOBJECT

Not used.

Not used.

Not applicable.

Not applicable.

AFX_WM_ACCGETSTATE

Used for accessibility support. Send this message to CMFCPopupMenu or CMFCRibbonPanelMenu to retrieve the state of the current element.

Index of element, which could be a menu button or separator.

Not used.

The element’s state. It is -1 if the index is invalid, 0 if the menu button has no special attributes. Otherwise it is a combination of the following flags:

TBBS_DISABLED –item is disabled

TBBS_CHECKED – item is checked

TBBS_BUTTON – the item is a standard pushbutton

TBBS_PRESSED –button is pressed

TBBS_INDETERMINATE – undefined state

TBBS_SEPARATOR - rather than a menu button, this element forms a separation between other menu items

AFX_WM_CHANGE_ACTIVE_TAB

The framework sends this message to the resizable control bar control. Process this message to receive notifications from CMFCTabCtrl objects when a user changes an active tab.

The index of a tab.

Not used.

Nonzero.

AFX_WM_CHANGE_CURRENT_FOLDER

The framework sends this message to the parent of CMFCShellListCtrl when the user has changed the current folder.

Not used.

Not used.

Not used.

AFX_WM_CHANGEVISUALMANAGER

The framework sends this message to all frame windows when the user changes the current Visual Manager. In response to this message, a frame window recalculates its region and adjusts other parameters as needed. You can process the AFX_WM_CHANGEVISUALMANAGER message in your application if you need to be notified about this event. You must call the base class handler (OnChangeVisualManager) to ensure that the framework's internal processing of this event takes place.

Not used.

Not used.

Not used.

AFX_WM_CHANGING_ACTIVE_TAB

Sent to the parent of CMFCTabCtrl object. Process this message if you want to receive notifications from CMFCTabCtrl objects when a user resets a tab.

The index of the tab that is being activated.

Not used.

Nonzero.

AFX_WM_CHECKEMPTYMINIFRAME

For internal use only.

Not applicable.

Not applicable.

Not applicable.

AFX_WM_CREATETOOLBAR

Sent from CMFCToolBarsListPropertyPage when a user creates a new toolbar during customization process. You can process this message to instantiate a custom CMFCToolBar-derived object. If you handle this message and create your own toolbar, omit the call to the default handler.

Not used.

A pointer to a string that contains the name of the toolbar.

A pointer to the newly created toolbar. NULL indicates that the toolbar creation was canceled.

AFX_WM_CUSTOMIZEHELP

Sent to the main frame window from the customization property sheet CMFCToolbarCustomizeDialog when the user presses the Help button or the F1 key.

Specifies the active page of the customization property sheet.

A pointer to a CMFCToolbarCustomizeDialog object.

Zero.

AFX_WM_CUSTOMIZETOOLBAR

The CMFCToolbarCustomizeDialog sends this message to notify the parent frame that the user is creating a new toolbar.

TRUE when customization is started, FALSE when customization is finished.

Not used.

Zero.

AFX_WM_DELETETOOLBAR

Sent to the main frame window when the user is about to delete a toolbar in the customization mode.

Process this message to take additional actions when a user deletes a toolbar in customization mode. You should also call the default handler (OnToolbarDelete), which deletes the toolbar. The default handler returns a value that indicates whether it is possible to delete the toolbar.

Not used.

Pointer to a CMFCToolBar object to be deleted.

Nonzero if a toolbar cannot be deleted; otherwise 0.

AFX_WM_GETDOCUMENTCOLORS

CMFCColorMenuButton sends this message to the main frame window to retrieve the document colors.

Not used.

[in, out] Pointer to a CList<COLORREF, COLORREF> object.

Zero.

AFX_WM_GETDRAGBOUNDS

For internal use only.

Not applicable.

Not applicable.

Not applicable.

AFX_WM_HIGHLIGHT_RIBBON_LIST_ITEM

Sent to the main frame window when a user highlights a ribbon list item.

Index of the highlighted item

A pointer to CMFCBaseRibbonElement

Not used.

AFX_WM_ON_AFTER_SHELL_COMMAND

Sent to a parent of CMFCShellListCtrl or CMFCShellTreeCtrl controls when a user finishes executing a shell command.

The ID of the command that the user executed

Not used.

If the application processes this message, it should return zero.

AFX_WM_ON_BEFORE_SHOW_RIBBON_ITEM_MENU

The framework sends this message to the ribbon's parent before it displays the pop-up menu. You can process this message and modify pop-up menus at any time.

Not used.

A pointer to CMFCBaseRibbonElement

Not used.

AFX_WM_ON_CANCELTABMOVE

For internal use only.

Not applicable.

Not applicable.

AFX_WM_ON_CHANGE_RIBBON_CATEGORY

The framework sends this message to the main frame when the user changes the active Ribbon Control category.

Not used.

A pointer to the CMFCRibbonBar whose category has changed.

Not used.

AFX_WM_ON_CLOSEPOPUPWINDOW

The framework sends this message to notify the owner of CMFCDesktopAlertWnd that the window is about to be closed.

Not used.

A pointer to CMFCDesktopAlertWnd object.

Not used.

AFX_WM_ON_DRAGCOMPLETE

For internal use only.

Not applicable.

Not applicable.

Not applicable.

AFX_WM_ON_GET_TAB_TOOLTIP

Sent to the main frame window when a tab window is about to display a tooltip for a tab, if custom tooltips are enabled.

Not used.

A pointer to a CMFCTabToolTipInfo structure.

Not used.

AFX_WM_ON_HSCROLL

Sent to the resizable control bar control. Process this message to receive notifications from CMFCTabCtrl objects when a scroll event occurs in the tabbed widget horizontal scroll bar.

The low-order word specifies a scroll bar value that indicates the user's scrolling request. For more information, see the table later in this topic.

Not used.

Nonzero.

AFX_WM_ON_MOVE_TAB

Sent to the parent of a tabbed window when a user drags a tab to a new position.

The zero-based index of the tab in its original position.

[out] The zero-based index of the tab in its new position.

Zero.

AFX_WM_ON_MOVETABCOMPLETE

For internal use only.

Not applicable.

Not applicable.

Not applicable.

AFX_WM_ON_MOVETOTABGROUP

Sent to the main frame window when a user moves an MDI child window from one tabbed group to another.

A handle to tabbed window (CMFCTabCtrl) from which the MDI child window has been removed.

[out] A handle to tabbed window (CMFCTabCtrl) to which the MDI child window has been inserted.

Ignored.

AFX_WM_ON_PRESS_CLOSE_BUTTON

Sent to a parent of CDockablePane when user clicks the Close button on the caption of the control bar.

Not used.

A pointer to a dockable pane on which the user clicked the Close button.

TRUE if a pane cannot be closed; otherwise FALSE.

AFX_WM_ON_RENAME_TAB

Sent to the parent of tabbed window after the user renamed an editable tab.

The zero-based index of the renamed tab.

[out] A pointer to a string that contains the new tab name.

Nonzero if the application processes this message; the framework will suppress the call to CMFCBaseTabCtrl::SetTabLabel. If zero is returned, then CMFCBaseTabCtrl::SetTabLabel is called by the framework.

AFX_WM_ON_RIBBON_CUSTOMIZE

Sent to the parent frame when user starts customization. Process this message if you want to display your own customization dialog box.

Not used.

A pointer to the ribbon control to be customized.

Nonzero if the application processes this message and displays its own customization dialog box. If the application returns zero, the framework will display the built-in customization dialog box.

AFX_WM_ON_TABGROUPMOUSEMOVE

For internal use only.

Not applicable.

Not applicable.

Not applicable.

AFX_WM_POSTSETPREVIEWFRAME

Sent to notify the main frame that the user changed the print preview mode

TRUE indicates that the print preview mode is set. FALSE indicates that print preview mode is turned off.

Not used.

Not used.

AFX_WM_PROPERTY_CHANGED

Sent to the owner of the property grid control (CMFCPropertyGridCtrl) when the user changes the value of the selected property.

The control ID of the property list.

A pointer to the property (CMFCPropertyGridProperty) that changed.

Not used.

AFX_WM_RESETCONTEXTMENU

Sent to the main frame window when the user resets the context menu during customization.

The resource ID of the context menu.

A pointer to the current context menu, CMFCPopupMenu.

Not used.

AFX_WM_RESETKEYBOARD

The framework sends this message to the main frame window when the user resets all keyboard accelerators during customization.

Not used.

Not used.

Not used.

AFX_WM_RESETMENU

The framework sends this message to the menu owner (a frame window) when the user resets an application frame menu during customization

The menu resource ID.

Not used.

Not used.

AFX_WM_RESETPROMPT

The framework sends this message when the user resets a toolbar from the toolbar customize dialog box. The default handler displays a message box that asks whether the user wants to reset the toolbar.

Not used.

Not used.

Not used.

AFX_WM_RESETTOOLBAR

A CMFCToolBar object sends this message when a toolbar is restored to its original state, that is, loaded from the resources. Process this message to reinsert toolbar buttons whose classes are derived from CMFCToolbarButton. For more information, see CMFCToolbarComboBoxButton.

The resource ID of a toolbar whose state was restored.

Not used.

Zero.

AFX_WM_SHOWREGULARMENU

CMFCToolbarMenuButton object sends this message to its owner when the user clicks a regular menu button. Process this message every time that you use CMFCToolbarMenuButton to display a pop-up menu when the user clicks a button.

The command ID of a button that sends the message.

Screen coordinates of the cursor. The low-order word specifies the x-coordinate. The high-order word specifies the y-coordinate.

Not used.

AFX_WM_TOOLBARMENU

Sent to the main frame window when the user releases the right button of a mouse while the mouse pointer is in the client or non-client area of a pane.

Not used.

Screen coordinates of the mouse pointer. The low-order word specifies the x-coordinate. The high-order word specifies the y-coordinate.

Zero if the application processes this message; otherwise, nonzero.

AFX_WM_UPDATETOOLTIPS

Sent to all tooltip owners to indicate that their tooltip controls should be recreated.

The type of control that should process this message. See the table later in this topic for a list of possible values.

Not used.

Not used.

AFX_WM_WINDOW_HELP

CMFCWindowsManagerDialog sends this message to the parent frame when the user clicks the Help button, or enters the help mode by clicking the Help caption button or the F1 key.

Not used.

A pointer to the instance of CMFCWindowsManagerDialog.

Not used.

The following table shows the values for the low word of the lParam parameter of the AFX_WM_HSCROLL method:

Value

Meaning

SB_ENDSCROLL

The user ends the scroll.

SB_LEFT

The user scrolls to the upper-left.

SB_RIGHT

The user scrolls to the lower-right.

SB_LINELEFT

The user scrolls left by one unit.

SB_LINERIGHT

The user scrolls right by one unit.

SB_PAGELEFT

The user scrolls left by the width of the window.

SB_PAGERIGHT

The user scrolls right by the width of the window.

SB_THUMBPOSITION

The user has dragged the scroll box (thumb) and released the mouse button. The high-order word indicates the position of the scroll box at the end of the drag operation.

SB_THUMBTRACK

The user is dragging the scroll box. The AFX_WM_ON_HSCROLL message is sent repeatedly with this value until the user releases the mouse button. The high-order word indicates the position to which the scroll box has been dragged.

Note

The high-order word of the lParam parameter specifies the current position of the scroll box if the low-order word is SB_THUMBPOSITION or SB_THUMBTRACK; otherwise, this word is not used.

The following table lists the flag values for the lParam parameter of the AFX_WM_UPDATETOOLTIPS message:

Flag

Value

AFX_TOOLTIP_TYPE_DEFAULT

0x0001

AFX_TOOLTIP_TYPE_TOOLBAR

0x0002

AFX_TOOLTIP_TYPE_TAB

0x0004

AFX_TOOLTIP_TYPE_MINIFRAME

0x0008

AFX_TOOLTIP_TYPE_DOCKBAR

0x0010

AFX_TOOLTIP_TYPE_EDIT

0x0020

AFX_TOOLTIP_TYPE_BUTTON

0x0040

AFX_TOOLTIP_TYPE_TOOLBOX

0x0080

AFX_TOOLTIP_TYPE_ALL

0xFFFF

See Also

Concepts

MFC Macros and Globals