Release 10.1A: OpenEdge Development:
Progress 4GL Handbook

Publishing an event

Once there are one or more subscribers to an event, then a procedure can publish that event and each of the subscribers receives it. The publisher does not have to preregister the intention of publishing the event, even though the subscriber must register the intent to receive it. This is the syntax for the PUBLISH statement:

PUBLISH event-name [ FROM publisher-handle ]   [ ( parameter [ , . . .] ) ].

As with the SUBSCRIBE statement, the default is to publish the event from the procedure that contains the PUBLISH statement. A procedure can also publish events on behalf of another procedure by including the FROM publisher-handle phrase. Any subscriber that has subscribed to the event of the same name in the publisher-handle, whether implicit, explicit, or ANYWHERE, receives it.