thanks jaxad0127, it looks like what another person said, I will look through the web page seriously, I hope that's what I want.

oh maybe I understand what you said. now I just want to set up a server on my computer, run client at the same time and use my own server address. so which one should I choose?

I don't know if it is the right one. my teacher gave me this server and tell me this is server side. but it is used C++ right? anyhow thanks for replying so fast.

I have the server side(almost code files) and who can tell me how to run it(I only have visual C++ 6.0)? use "runsrv.bat"? additionally, before running the server what should I do to config it? it's a big question for me, cause I'm not good at english and those documentations are hard to u...