Called in main thread whenever the last connection to a topic is removed from the list of connections
[C++]
virtual void OnTopicRemove(
   LPCSTR pszTopic
);
The topic string.
This method is called whenever the a topic is removed from the list of connections.
			It will only be called when the last connection to the topic is removed.
			The default implementation does nothing.
Header: xlppush.h
CXllPushApp Class 
					  | CXllPushApp Methods			 
					  | CXllPushApp::OnTopicRemove