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GET-CALLBACK-PROC-CONTEXT( ) method
Returns the handle of the procedure that contains the internal procedure associated with the ABL callback for the specified event.
Return type:
Applies to:
 
Syntax 
GET-CALLBACK-PROC-CONTEXT ( event-name )
event-name
The name of a defined event.
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” section.
See also:

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