I don't know but the first sentence:
Quote:
I need to build a customer support chat,
but don't need to buy, I need to develop own, using asp, or asp.net
is somehow in conflict with the next one:
Quote:
Please send me a code for this, Or please specify me a link, I need client and server chat
Don't you think?
In conclusion:
If you want someone to make the work for you...
www.rentacoder.com[
^] or
www.oDesk.com[
^]
If you want to develope it on your own, then start for the beggining. Feel free to come back when you get stuck with something and do a concrete question, then you will see, that people here is glad to help. But I strongly recommend you to read
What have you tried?[
^] first, so you next question really gets the answer it deserves