Help programming bluetooth car

I'm trying to make this car/robot http://www.dx.com/p/arduino-compatible-bluetooth-controlled-robot-car-kits-146418#.U-t6rp2Syxo.
And my goal is trying to control it using my phone (Windows Phone 8.1).
The thing is, I have no idea how to program this. I finished building the robot using this tutorial Arduino – Ad Hoc Node. But the tutorial uses Android instead of Windows Phone. Can someone help me with the programming? Is there a tutorial for this somewhere?

The thing is, I have no idea how to program this.

Then this probably wasn't the project for you.

Can someone help me with the programming?

Of the Arduino? What is the robot to do?

Of the phone? Does this look like a Windows Phone 8.1 forum?

Is there a tutorial for this somewhere?

No.