guys im new to .net network programming and i want to make this simple messenger that would allow multiple connections, now i've read and downloaded the tutorial on sockets and the 1client - 1 server chat system. what i want to do is to have the program open with windows and stay in the background only to pop up when ever I (server) send a message to a specific client or all clients. Do I have to make the client server as a windows service? how do i go about doing that?
i plan on using this application at home, i have like 5 pc's at home on 3 floors, and i want to be able to send a message to my sister or someone using a client computer on my home LAN.

Thanks much for reading and your patience...
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m1k3