public delegate void ClosedEventHandler( object sender, ClosedEventArgs e );
Public Delegate Sub ClosedEventHandler( sender As Object, e As ClosedEventArgs )
The event source.
A ClosedEventArgsobject that contains event data.
When creating a ClosedEventHandler delegate, you identify the method that will handle the corresponding event. To associate an event with your event handler, add a delegate instance to this event. The event handler is called whenever the event occurs unless you remove the delegate. For more information on event handler delegates, see Events and Delegates in MSDN.