Hi Ben,

As you noted, the WM_Touch messages aren't available with WPF. The reason for this is that WPF actually blocks these messages. My only guess is that, as they are working on supporting the feature more fully for WPF 4.0, they're attempting to maintain control over how multi-touch is handled. WPF uses only one window, so the touch points can't be distinguished among the various visual elements - only the top window. Because of this, I can only speculate that they are capturing these messages and providing some special cases to them to emulate this functionality.

As for the stability and reliability of the NextWindow driver, you'll have to accept that the driver is in beta and will have some issues. Hopefully, they'll have all of that ironed out before Windows 7 hits. In my experience, it has been stable enough for development purposes. How are things going for you?

--Andrew

Hey Ben,

Glad to hear its been helpful :D

Unfortunately, I'm not sure I can help you with re-implementing the touch gestures. I'll give you some advice, though, that I often find helpful with any programming problem.

Try to solve the problem on paper, first. In this case, think about how you determine which gesture is being performed - what the differences are between the gestures you wish to support geometrically. Then go through that process, step by step, and write down the steps (psuedo code is always helpful when trying to figure something out). With this, you'll be able to derive what variables you need, as well as the math required to determine what's going on.

As far as math skills go, it is fairly simple geometry when you get down to it, so look into that if you need some guidance. Again, take the approach of how your mind recognizes the gesture, then work on the programming to emulate that. You can learn a lot from how your mind works, if you analyze the steps it takes to reach a conclusion.

Good luck!

--Andrew

No problem. Have fun :D

--Andrew

And here's the post on manipulation events.

--Andrew