What do I need to build a Tic Tac Toe game online, in which two peoples can play?

I need to learn its networking side. I mean to what extent I need to learn network programming. Where are C++/CLI tutorials available for networking? Books? Just tell me requirements for connecting the two players...

Any tutorials on C++/CLI network programming which teach me enough so that it would allow me to do all this would be really appreciated

Thanks