Invoked when an unhandled Keyboard.PreviewKeyDown attached event reaches an element in its route that is derived from this class. Implement this method to add class handling for this event.
Target Platforms: Windows 11, Windows 10, 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