Gets a reference to the SheetDeactivate event
CXlSheetDeactivateEvent& SheetDeactivateEvent( );
The function returns a reference to the application's SheetDeactivate event, which is of type CXlSheetDeactivateEvent.
The SheetDeactivate event is raised when a worksheet is deactivated. All registered observers receive the event via the CXlEventObserver::Update method.
When observers are notified, an argument of type CXlWorksheetEventArgs is passed.
Observers can register for this event at any point in the life of the XLL. Registration can be done explicitly using Register, or automatically by creating an instance of CXlSheetDeactivateEventStaticObserver.