NWPA is a consumer of this event. This is a consumable event that tells NWPA to perform an instance unload on a particular adapter. NWPA will consume the message and return before completing the instance unload. The shortEventData field of the EventBlockStruct structure contains the following information:
LONG HIN
LONG flag(0 = normal unload,
1 = force unload without prompting for OK)
LONG eventID(to be returned later in the reply)
The eventID is any value the producer wants to include to aid in identifying and/or handling the event during the reply.