I have a WPF application that is capable of being used both with a mouse and using Touch. I disable all windows \"enhancements\" to just have touch events :
It is not completely clear to me if you actually want to avoid touch promotion to mouse or not, since you first ask about how to avoid moving the mouse cursor from touch, but then in a comment you explicitly say that you do want mouse promotion.
If you want to avoid mouse promotion, I posted an answer that works from Windows 8 and later here.