What you want is some network code. Very difficult for beginers, I'm afraid.Basicly, you would use the DirectPlay functions in B3d to Conect to the other perdon, and then exchange messages, acknolagements ect.
However, this isn't quite what Blitz was designed for, so I would advise you to try somthing simpler first.
However, this isn't quite what Blitz was designed for, so I would advise you to try somthing simpler first.