Release 10.1A: OpenEdge Development:
ADM Reference

confirmExit

Procedure that passes this event on to its descendents, to check whether it is OK to exit (that is, there are no unsaved changes).

Location: containr.p

Parameters:

INPUT-OUTPUT plCancel AS LOGICAL

If field values have been modified and not saved, it returns TRUE and the destroyObject is cancelled.

Notes: Invoked from destroyObject.