An event which is raised when a worksheet is activated.
class CXlSheetActivateEvent : public CXlEvent
The event occurs when a worksheet is activated.
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 CXlSheetActivateEventStaticObserver.
When observers are notified, an argument of type CXlWorksheetEventArgs is passed.