How to draw shapes in WP7 using your finger? I am trying to implement a simple paint application, but I'm not sure how to draw a drawing.
fingerpaint is your friend
try using Ruby using http://script.iron7.com/#/Script/Detail?scriptId=FingerPaint&userLowerCaseName=iron7
or in C # at http://sigurdsnorteland.wordpress.com/2010/10/20/fingerpaint-a-little-wp7-paint-app/
Note that the two sets of code are not exactly the same: C # fingerpaint had some problems drawing new tracks on top of the old ones, so I changed this when I wrote Ruby.
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Line Access StylusDown, StylusMove, and StylusUp events. Draw lines, if necessary, depending on whether you want straight or free-form lines.