hi , i m a newbie in game programming i confuse on what to do before i start working on a network game. what basic should i know what research should i do. and last of all.... how to do it in VB?

If you''re a newbie game programmer, then don''t think about networking yet. Get a simple game going first. Pick whether you want it in 2D or 3D and then pick an API to use. Then learn the API. Then after you get familiar with the API and the structure of a game then maybe you should consider network game programming.