Well considering this sounds more like a curious question then an assignment I will help

Becouse I want you to learn how to do it yourself I wont give you the code

I will however tell you how to make it and give you help with what to do on certain things

before I can however I must know what kind of chat?

Similar to an Instant Messaging Program?

Or like a chat room program?

Is like a mail system?

There are several ways to make it just let me know and I can help you out

I would also like to know what you want it for if you dont mind

~ Geo

 ~ You are unique, just like everyone else