title: When a Facebook user sends the Send dialog within an application, can the application track the recipients?
body: <p>When users open a Send dialog (e.g. <a href="http://www.facebook.com/dialog/send?app_id=123050457758183&amp;name=People%20Argue%20Just%20to%20Win&amp;link=http://www.nytimes.com/2011/06/15/arts/people-argue-just-to-win-scholars-assert.html&amp;redirect_uri=http://www.example.com/response" rel="nofollow noreferrer">http://www.facebook.com/dialog/send?app_id=123050457758183&amp;name=People%20Argue%20Just%20to%20Win&amp;link=http://www.nytimes.com/2011/06/15/arts/people-argue-just-to-win-scholars-assert.html&amp;redirect_uri=http://www.example.com/response</a>) they can add or remove people from the To: line.</p>
  <p>Is there a way for the application to track who was in the To: line if and when the user actually pushes Send?</p>