Returns the handle of the procedure that contains the internal procedure associated with the ABL callback for the specified event.
Return type: HANDLE
Applies to: Buffer object handle, ProDataSet object handle, Query object handle
If the object does not have a callback procedure for the specified event, this method returns the Unknown value (?).
Use the SET-CALLBACK-PROCEDURE( ) method to associate an internal procedure with a callback for an object.
For more information on events, see the Handle-based Object Events Reference.