Question

I have got a monitor with multitouch overlay on top of it. It works fine with Windows 7 but I want to write a multitouch application in C# for Windows XP which doesn t support touch feature out of the box. There is no documentation whatsoever and I emailed the manufacturer but never got a reply.

However the device works with Google Earth, which doesn t natively support multitouch, on Windows XP. So I think it generates many types of messages together i.e. WM_TOUCH for Windows 7, one for Google Earth COM API, and probably its own messages either in UDP or Windows message form. How can I trap all communications and learn the protocol?

Answer 1

OllyDbg is a very low-level debugger that allows you to see a lot of the messages going back and forth on the machine. I ve seen it used to reverse-engineer a USB device driver s messages to figure out how to interact with an item.

I suspect that would be an excellent place to start. It should allow you to determine how the messages are being passed and, perhaps, start teasing apart their structure.

Answer 2

There are solutions like Tuio around that do not rely on Windows 7. Maybe a tuio (or alternative) implementation would make you life easier.

Answer 3

I ve recently been developing on the Windows 7 platform for multitouch. I m using UniTuio -- see http://xtuio.com You can look at my question I had to get it working. I m also using a bridge for Windows 7 called Touch2TUIO, it seems to work quite well. If you need to make the mouse inactive see my question here: using windows 7 with unituio

友情链接