[2005] How Sockets Work? Server/Client?

Hello, i have been searching google and MSDN i still do not understand how Sockets work. How do i make a program that is multiplayer? What's with the Server/Client? Do i need to make two different programs one server then a bunch client to give to each user? How do the sockets work? How do i set up sockets?

Please provide examples. Of a simple multiuser application.... Or how sockets are referenced/used.

A socket is merely a defined IP address and port number which can then be used to transmit data with. The codebank forum here has a few examples of client/server apps. One of those can be found here: http://www.vbforums.com/showthread.php?t=390875