title: Get real Position of Window in WPF
body: <p>how do I get the real Position (in Pixels) of a WPF-Window?</p>
  
  <p><code>this.PointFromScreen( new Point( 0, 0 ) );</code> does not gives real Position on Screen when I use DPI of 150% for Font. I guess this has something to do with scaling, but in my case I need the "real" position on Screen.  </p>