Flash Roulete blackjack win rate control

I Have an fla of a flash project, it is a casino roulette and a casino blackjack. They work fine but they give profits by luck. I need an expert in flash and programming that will make them to give a specified amount back to the player and don't let him win above a given percent. The money that players put will be summed and after an ammount the game will give to players a percent of this amount, like I give a percent of the played money back to the players. The money that will players play will be given by VB and javascript and all the returning values will be given to VB java through fscommand (if needed any) Thank you ## Deliverables I want the software to be ready and functional and straight forward explained and cleared.