ButtonBase.OnKeyDown Method
Raises the OnKeyUp event.
Assembly: System.Windows.Forms (in System.Windows.Forms.dll)
Parameters
- kevent
- Type: System.Windows.Forms.KeyEventArgs
A KeyEventArgs that contains the event data.
Raising an event invokes the event handler through a delegate. For more information, see Raising an Event.
The OnKeyDown 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.
Note
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Do not call OnKeyDown if the button is disabled (this includes calls to the base class's OnKeyDown method when you override OnKeyDown in a derived class). When disabling the button in an override of OnKeyDown, call the base class's OnKeyDown method before disabling the button, or do not call it at all. |
Notes to Inheritors
When overriding OnKeyDown in a derived class, be sure to call the base class's OnKeyDown method so that registered delegates receive the event.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, 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.
