Provides class handling for the KeyDown routed event that occurs when the user presses a key while this control has focus.
protected override void OnKeyDown(
This implementation marks the KeyDown event as handled by setting the Handled property of the event data to true when ClickMode is not set to Hover and one of the following cases are true:
In all other cases, this implementation does not change the handled state (the Handled property) of the KeyDown event data.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.
Supported in: 4.6, 4.5, 4, 3.5, 3.0
.NET Framework Client Profile
Supported in: 4, 3.5 SP1
Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.