What happened to
Google[
^], is it broken at your side?
Try something by your side first, then post your questions if you get stuck'd somewhere. This is not at all appropriate.
You can even try search on
CodeProject[
^] with same question and get many similar solved answers.
I have answered similar question before which is first link of the previous search on CP, check it out:
How do i make a chat Server....[
^]