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Assembly: Microsoft.Office.Interop.UccApi (in microsoft.office.interop.uccapi.dll)
These events are used to notify an application of the receipt of a new instant message and an update of the state of a participant composing a message as well as the response to an asynchronous SendMessage request made by an instant messaging session participant. This is a dispinterface. Its members define the event handlers for the events raised by an IUccInstantMessagingSessionParticipant object. To catch the events, a UCC API client must implement these event handlers and advise the event source of the implementation if it is interested in receiving the events. To prevent memory leaks, the client should unadvise the events when it is no longer interested in the events.
Win32 COM/C++ Syntax