title: How to get absolute position of shape in PowerPoint add-in?
body: <p>I'm writing plugin for MS PowerPoint using C#.
  I need to get position each PPT shape in screen coordinates when presentation is running.
  How it can be obtained?</p>
  
  <p>I have position of presentation viewer window and have shape position relative to top-left corner of the slide. But I haven't position of the slide relative to pesentation viewer.</p>