A while ago I brought myself a 7" Lilliput TFT touch-screen to muck about with. Originally I had planned to mount it in a car and use it for multimedia output. To that end I put together a simple 'stroke recognition' app to test on the screen; the idea being that using simple shaped stroke movements to control the playback of music or whatnot.

Download the source code here. Contains a 2D box class (point containment, expansion, rendering) that might be useful for other things. Built with .NET 1.1 and VS 2003.