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Control.Capture Property

  • Reference

Definition

Namespace:
System.Windows.Forms
Assembly:
System.Windows.Forms.dll

Gets or sets a value indicating whether the control has captured the mouse.

public:
 property bool Capture { bool get(); void set(bool value); };
[System.ComponentModel.Browsable(false)]
public bool Capture { get; set; }
[<System.ComponentModel.Browsable(false)>]
member this.Capture : bool with get, set
Public Property Capture As Boolean

Property Value

Boolean

true if the control has captured the mouse; otherwise, false.

Attributes
BrowsableAttribute

Examples

The following code example demonstrates the Capture property. To run this example paste the following code in a form containing a Label named label1 and two ListBox controls named listbox1 and listbox2. Ensure the form and controls' MouseDown event is associated with the method in this example.

// This method handles the mouse down event for all the controls on the form.  
// When a control has captured the mouse
// the control's name will be output on label1.
void Control_MouseDown( System::Object^ sender,
   System::Windows::Forms::MouseEventArgs^ /*e*/ )
{
   Control^ control = (Control^)(sender);
   if ( control->Capture )
   {
      label1->Text = control->Name + " has captured the mouse";
   }
}

// This method handles the mouse down event for all the controls on the form.  
// When a control has captured the mouse
// the control's name will be output on label1.
private void Control_MouseDown(System.Object sender, 
    System.Windows.Forms.MouseEventArgs e)
{
    Control control = (Control) sender;
    if (control.Capture)
    {
        label1.Text = control.Name+" has captured the mouse";
    }
}

'This method handles the mouse down event for all the controls on the form.  When a control has
'captured the mouse, the control's name will be output on label1.
Private Sub Control_MouseDown(ByVal sender As System.Object, _
    ByVal e As System.Windows.Forms.MouseEventArgs) Handles MyBase.MouseDown, _
    label1.MouseDown, listbox1.MouseDown, listbox2.MouseDown
    Dim control As Control = CType(sender, Control)
    If (control.Capture) Then
        label1.Text = control.Name & " has captured the mouse"
    End If
End Sub

Remarks

When a control has captured the mouse, it receives mouse input whether or not the cursor is within its borders. The mouse is typically only captured during drag operations.

Only the foreground window can capture the mouse. When a background window attempts to do so, the window receives messages only for mouse events that occur when the mouse cursor is within the visible portion of the window. Also, even if the foreground window has captured the mouse, the user can still click another window, bringing it to the foreground.

When the mouse is captured, shortcut keys should not work.

Applies to

See also