Is there any tutorial or example available that shows how to implement a custom gesture into Microsoft Surface? After hours of googling I couldn't find any.
Unfortunately, the SDK does not even provide a framework to recognize gestures.
Im particularly intersted in gestures like a circle, or ? or x
Edit: Is there any news here? Or any good hints how to just recognize a X over a UI element?
Generally it is not a good idea to creat complex gestures like that in your application because they are really hard for people to discover. That said, you could track the touches to create a polyline and then apply an algorithm like the one outlined at
http://faculty.washington.edu/wobbrock/pubs/uist-07.1.pdf
to distinguish the path in a set of gestures.
Another option, but maybe not what you want is to use the SurfaceInkCanvas and recognize the text entered there.
Thanks!