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Application Migration and Development Guide
Application Development with PAS for OpenEdge : Programming ABL Client Applications : Managing asynchronous requests : Handling the response from an asynchronous request
Handling the response from an asynchronous request
When an asynchronous request completes execution on the server, it sends a response to the client, which places it on the response queue for the appropriate server handle. To signify that the response is ready to be processed, the PROCEDURE-COMPLETE event is placed on the event queue where it can be processed in the context of blocking I/O statements, such as WAIT-FOR or the PROCESS EVENTS statement.
* Event procedures
* Obtaining error information
* Obtaining parameter values
* Obtaining the return value