modified existing simple voice chat app vb.net or c# or c++

Hello. I would like to modified voice chat application for my private games use. - add simple login forms with encryption hash (mysql) connection. - always appear window in front while playing games. - push a keyboard button to talk / defined button from players. Tell me how long it would take to get it done. Will hired you immediately. need only 4-5 STARS or TRUSTED or GOOD REVIEW. its just simple voicechat. don't you dare to get HIGH funds from this job.