title: Get IUnkown using window handle
body: <p>I know this may be a long shot so forgive me as I don't really know that much about COM.</p>
  
  <p>Basically what I am trying to do is get the pointer to the IUnknown interface for a running application, the problem is the only thing I know about the app is its main window handle.</p>
  
  <p>Would this be possible?</p>