This API supports the .NET Framework infrastructure and is not intended to be used directly from your code.
protected override void OnKeyDown(
property is set to CheckBoxes and the true property is set to Handled , the false method switches between selecting and clearing the check box when the user presses the SPACEBAR. OnKeyDown
Raising an event invokes the event handler through a delegate. For more information, see
. Raising an Event
method also allows derived classes to handle the event without attaching a delegate. This is the preferred technique for handling the event in a derived class. OnKeyDown Notes to Inheritors
in a derived class, be sure to call the base class's OnKeyDown method so that registered delegates receive the event. OnKeyDown .NET Framework
Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0
.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.