hello i have just started opengl and i have written a compiler for .map files that are generated be worldcraft now i can run my levels in my engine but i now i want to add multiplayer so i need to know where to start maybe there are some tutorials can someone help me? or give me some pieces of advice thx

My advice would be to learn network programming with TCP/IP and UDP/IP. There are many good tutorials on this site (and on other sites) and the best thing to do is search for them, read and experiment.

will do