3.1.1 IRPCAsyncNotify Server Details
Unidirectional message passing mode in the IRPCAsyncNotify interface is illustrated by the following server state diagram.

Figure 5: Unidirectional message passing mode
Bidirectional message passing mode is illustrated by the following two server state diagrams. The first diagram illustrates remote object creation and deletion, client registration, and the opening of notification channels. The second diagram details the processing of an open channel, including its eventual closure.

Figure 6: Bidirectional message passing mode
The following diagram illustrates the processing of a single open channel.

Figure 7: Processing a single open channel