Thread: Multi user domains... How to?

i was wondering a few things:
1) how would i hook a program to the internet that would support multiple user IN THE SAME GAME
2) how to allow them to interact between each other (for instance 1 person say something, and it is displayed on another persons screen)
3) how to be able to use my computer as a server for this (I am on a PC, using microsoft visual C++)

Well you didnt say what OS this is for.
If it is windows you can use winsock to connect different computers over the internet.
If you are using direct X look into direct play.

A google search will turn up lots of information on using winsock.