Hi Sachin,
Depending on whether you are using B1DE.
But normally, after you initialize your Application.SBO_Application object,
you would add below code to register the event :
SBO_Application.AppEvent += new _IApplicationEvents_AppEventEventHandler(SBO_Application_AppEvent);
or
SBO_Application.AppEvent += SBO_Application_AppEvent;
SBO_Application_AppEvent
Regards
Edy