To use class events in your application, you must create one or more event handlers. A class event handler can be any class method or internal procedure whose signature is compatible with the signature defined for a given ABL or .NET class event. However, verification of the event handler signature occurs at a different point for method event handlers (at handler subscription compile time) than for internal procedure event handlers (at event publish run time). Note that all class event signatures include a VOID return type; therefore, any event handler method must also have a VOID return type.
For ABL class events, including ABL class events that implement inherited .NET abstract events, if you raise ERROR or throw an error object, the error is raised on the statement that executes the
Publish( ) event method on the event as if you had called the event handler directly. For information on errors raised in handlers for .NET events, see
Defininghandlers for .NET events.
