title: iphone - take screenshot of another app?
body: <p>Would it be possible to have my app take a screenshot of another app?  For instance, to make some sort of "screenshotter" application?</p>
  
  <p>I know you can take a screenshot of any UIView, but would it be possible to <em>get</em> any UIView?  For instance, another app, or what's running below?</p>