title: In html the object tag property classid="X", how do you know what X should be. How would I find the class-id string
body: <p>In html the object tag property classid="X", how do you know what X should be. How would I find the class-id string. </p>
  
  <p>Some of them are this long hex string. How do you know what the string should be why the long hex string which is unreadable. Is there a link to sight that maps all theses classids to what handles them. </p>
  
  <pre>
      object classid="clsid:d27cdb6e-ae6d-11cf-96b8-444553540000"
  </pre>
  
  <p><a href="http://www.w3schools.com/media/media_object.asp" rel="nofollow">http://www.w3schools.com/media/media_object.asp</a></p>