Base. On Key Down(KeyEventArgs) Method
Raises the OnKeyUp(KeyEventArgs) event.
protected: override void OnKeyDown(System::Windows::Forms::KeyEventArgs ^ kevent);
protected override void OnKeyDown (System.Windows.Forms.KeyEventArgs kevent);
override this.OnKeyDown : System.Windows.Forms.KeyEventArgs -> unit
Protected Overrides Sub OnKeyDown (kevent As KeyEventArgs)
Raising an event invokes the event handler through a delegate. For more information, see Handling and Raising Events.
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.
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.