title: Detect Mouse leave stage while dragging in Actionscript 3
body: <p><a href="http://livedocs.adobe.com/flash/9.0/ActionScriptLangRefV3/flash/display/Stage.html#event:mouseLeave" rel="noreferrer">Event.MOUSE_LEAVE</a> is great in Actionscript 3, but it doesn't seem to fire if the user is holding their left (or right for that matter) mouse button down.</p>
  
  <p>Is there a way to detect if the mouse leaves the Flash movie while the mouse is held down? Or if it is released outside the flash movie?</p>