OnKeyDown Method
This documentation is archived and is not being maintained.

CheckBox.OnKeyDown Method

Responds to a CheckBox KeyDown event.

Namespace:  System.Windows.Controls
Assembly:  PresentationFramework (in PresentationFramework.dll)

protected override void OnKeyDown(
	KeyEventArgs e
)

Parameters

e
Type: System.Windows.Input.KeyEventArgs
The KeyEventArgs that contains the event data.

This implementation marks the KeyDown event as handled by setting the Handled property of the event data to true when the user presses the plus or the minus key.

This method sets IsChecked to true when the user presses the plus key and to false when the user presses the minus key.

Notes to Inheritors

If you override OnKeyDown, always call the base implementation in your OnKeyDown implementation. Failure to call the base implementation prevents base classes from handling the event with a class handler, which might change the run-time behavior of the final class. You can call the base implementation either before or after your special handling, depending on your requirements.

.NET Framework

Supported in: 4, 3.5, 3.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.
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