The methode bstudio posted is possible, but not realy good. The problem is that the computer which has opened a game have to ping all the time to the server which saves the database so that the database server knows if the server with the game is still online. And another problem is that you need a database server and if this server crashs, no one can play anymore because they can't find any games!

A better methode would be to use UDP, send a broadcast and every computer which has an open session sends back his data (IP,...). It's simple and very effective! Games like CS,... use this technic.

Dark_Samurai