[1.0/1.1] Help with TCP ip/

Hi guys. I have to do something here at work using TCP ip. Now I'm familiar with TCP ip I normally use connectionless TCP ip, i.e. when you want to send a message from a client to a server, you make a connection, send the message and then the connection ends.

Now a guy here did a component that requires a permanent connection. i.e. when the client starts, the connection should be made and then you could send messages to and fro with that same connection. Also if the client goes down, the server should detect it. The problem is he isn't showing me how to do it and I'm finding little literature on it.

Does anyone have any links or books that I could use to help me with this? Basically its using TCP ip with connection oriented sockets.

Thanks,
Jennifer.