Gets a reference to the WorkbookDeactivate event
CXlWorkbookDeactivateEvent& WorkbookDeactivateEvent( );
The function returns a reference to the application's WorkbookDeactivate event, which is of type CXlWorkbookDeactivateEvent.
The WorkbookDeactivate event is raised when a workbook is deactivated. All registered observers receive the event via the CXlEventObserver::Update method.
When observers are notified, an argument of type CXlWorkbookEventArgs 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 CXlWorkbookDeactivateEventStaticObserver.