help on a chat server required

i dont know how a chat server can be implemented
can anyone help me
i dont want coding
i only want techniques or information about a chat server and its internal working

this article has info you probl like :

http://www.vb-world.net/internet/winsock/

huh.. and this ;)

http://www.vbforums.com/showthread.p...threadid=76968