Arduino/multitouch/pc

For my intern project I'm making some kind of multi touch tablet using an Arduino Mega2560. I’m able to specify my X and Y coordinates. But can't find the right code to send the coordinates to the computer. I read about the Arduino Leonardo that does the trick some sort, but it will only convert to a mouse movement. That’s not exactly what I want it to do, because I’d like something that works like microsoft pixelsence, so with multiple touch.

Can someone help me with this, or tell me where I can find more information?

I read about the Arduino Leonardo that does the trick some sort, but it will only convert to a mouse movement.

No you can get it to send keyboard key strokes as well.

But can't find the right code to send the coordinates to the computer.

With the Mega all you can do is to communicate with the Serial print or Serial write command. Then you need code on the PC that receives that input. You can write this code in Processing or virtually any other language.