title: How do I find the GraphicsDevice where an external process' window is opened
body: <p>I need to find the <code>GraphicsDevice</code> (e.g. the physical monitor) where an external process has opened its window.  To grab screen shots to catch changes WRT older versions. We're talking apps running on localhost, JS is heavily used.</p>
  
  <p>In my case I have a Java process (based on Selenium) that opens a browser window and needs to grab a screen shot of it (using <code>java.awt.Robot</code>), unfortunately the display where the window is opened depends on where the browser remembers that it was the last time it was closed.</p>
  
  <p>So, is there any way I can have my Java process find out which <code>GraphicsDevice</code> the browser window was opened on?</p>