Microsoft.Win32 (system.dll)delegate

This delegate defines the signature that an event handler must use to receive the SystemEvents.SessionEnding event. This event is raised when the user has chosen to log off or shutdown the system. It occurs before the SystemEvents.SessionEnded event. SessionEndingEventArgs provides a Cancel property, which you can set in the event handler to cancel the pending shutdown.

public delegate void SessionEndingEventHandler(object sender, SessionEndingEventArgs e);

Associated Events

SystemEvents.SessionEnding( )

    Part II: Programming with the .NET Framework
    Part IV: API Quick Reference
    Chapter 26. System