Hi . My Name is Nassar .. i want help in my graduated project (AR Virtual Change Room )

Augmented reality uses web cam images of real customers combined with measurements to create a True BodyTM avatar.

Users can include real garments & accessories from existing wardrobe to create outfits

I want to know how the programming the gesture navigation to instead of mouse controls when changing outfits in Silverlight ???????????

see to this link :
http://www.youtube.com/watch?v=mJKijrVDfWs&feature=related