Called in main thread whenever a new topic is added to the list of connections
[C++]
virtual void OnTopicAdd(
   LPCSTR pszTopic
);
The topic string.
This method is called whenever a new topic is added to the list of connections.
			It will not be called for the second or third such connection, only the first.
			The default implementation does nothing.
Header: xlppush.h
CXllPushApp Class 
					  | CXllPushApp Methods			 
					  | CXllPushApp::OnTopicRemove