On Visible Changed(EventArgs) Method
Raises the VisibleChanged event.
protected: override void OnVisibleChanged(EventArgs ^ e);
protected override void OnVisibleChanged (EventArgs e);
override this.OnVisibleChanged : EventArgs -> unit
Protected Overrides Sub OnVisibleChanged (e As EventArgs)
Raising an event invokes the event handler through a delegate. For more information, see Handling and Raising Events.
The OnVisibleChanged 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.