Release 10.1A: OpenEdge Development:
Progress 4GL Reference

FIRST-ASYNC-REQUEST attribute

Returns the first entry in the list of all current asynchronous request handles for the specified AppServer or Web service that have been created in the current session.

Data type: HANDLE

Access: Readable

Applies to: Server object handle

If there are no asynchronous request handles for the specified server, FIRST-ASYNC-REQUEST returns the Unknown value (?).