Control. On Create Control Method
protected: override void OnCreateControl();
protected override void OnCreateControl ();
override this.OnCreateControl : unit -> unit
Protected Overrides Sub OnCreateControl ()
Raising an event invokes the event handler through a delegate. For more information, see Handling and Raising Events.
The OnCreateControl 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.