public delegate void NodeClickEventHandler( object sender, NodeClickEventArgs e );
Public Delegate Sub NodeClickEventHandler( sender As Object, e As NodeClickEventArgs )
The event sender (typically the TreeList control).
A NodeClickEventArgs object that contains the event data.
When you create a NodeClickEventHandler delegate, you identify the method that will handle the event. To associate the event with your event handler, add an instance of the delegate to the event. The event handler is called whenever the event occurs, unless you remove the delegate.