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Clicks not aligned with the red touch points for DPI differs from 96 DPI

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With Vista and later, Microsoft lets users vary the DPI of the screen to make text and icons larger. It is quite possible that users with touch screens will do this to make them more touch friendly. Testing the alpha with DPI set to 125% then the clicks were misaligned with the red touch points.
 
Probably needs somewhere in the code use of:
PhysicalToLogicalPoint(hwnd,&pt);
or some such.

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