This content is no longer actively maintained. It is provided as is, for anyone who may still be using these technologies, with no warranties or claims of accuracy with regard to the most recent product version or service release.
An add-in is a web-based application which can be associated with a chat room (see AddIn).
Assembly: Microsoft.Rtc.Collaboration.GroupChat (in Microsoft.Rtc.Collaboration.GroupChat.dll)
The add-in is displayed in the group chat client in a panel beneath the chat area. The chat room interacts with the add-in, sending it notification of inbound and outbound messages. The add-in also has access to metadata about the chat room and the messages which are posted to it.
An add-in must be registered with the system before it can be used on a chat room. The list of registered add-in may be obtained from BeginGetAllAddIns(AsyncCallback, Object). See BeginRegisterAddIn(GroupChatAddInSettings, AsyncCallback, Object) for more information about registering add-ins.