Help Voice Chat

I would like to know if it is difficult to do this, I know it is difficult to do this, I do not know much about programming, it would have someone very good to activate, this function is already in the game, and it has never been Used by the bb never saw it working, I wanted to be able to uzala someone there to help me please.
http://image.prntscr.com/image/76175...482c830673.png

It would be very cool if you could use it. Someone could make this hand for us, since most of the fps are boring of voice wanted to put in the pb tbm to be top and to be more fun please somebody?