title: Get Mouse Position on Canvas (But NOT on window)?
body: <p>I have a project in WPF 4 and vb.net 2010.</p>
  
  <p>I have a canvas inside a window. The window is full screen, but the canvas is set to a solid 640x480 in the center of the window. I need to get the mouse position inside of the canvas, but NOT inside of the window. How do I do this?</p>