In that case, you should start learning from tutorials, unfortunatelly I don't know any from the top of my head, but if you do a search on the forums, I'm sure you will find posts with links to tutorials.

If you want to see some programs that use winsock, here are 2 programs that you might find usefull:
Web Server: http://www.vbforums.com/showthread.php?t=283785
Chat program: http://www.vbforums.com/showpost.php...2&postcount=43
Send files (client/server program): http://www.vbforums.com/showthread.php?t=377648