Hi there, how can i accomplish this.

when a user connects to the server i want it to trigger something that will send all the users that are connected the name of the new user who connected.

i.e. userA connects, and the server sends to all other connected users that UserA has connected and keeps that name in the list ( which is a treeview right now) then if UserB connects, it sends to everyone that he has connected ( puts his name in the treeview) then is UserB connects i need it to send something to the server that will in turn tell all clients that UserB has left.

Basically like a chatroom list of whos in the chatroom. Thanks!