The article that I just wrote was tested on the HP TouchSmart tx2.  This code should also run on the Dell Latitude XT and XT2 Tablet PC as well.  Those products use the same N-Trig hardware.

I don't have a Dell Latitude Tablet PC at my disposal so if there is anyone who reads this article that has one, I would greatly appreciate hearing from you if you were able to make the code work.

Thanks...