Parameters
- e
 - A System.EventArgs that contains the event data.
 
Raising an event invokes the event handler through a delegate.
            
            
            
            
            The OnEnter 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.
Notes to Inheritors:
When overriding OnEnter in a derived class, be sure to call the base class's OnEnter method so that registered delegates receive the event.
Target Platforms: Windows 2000 Professional (SP4), Windows 2000 Server, Windows 2003 Server (SP1), Windows 2008, Windows XP (SP2), Windows Vista, Windows 7, Windows 8