title: Cannot read from registry - HKEY_CLASSES_ROOT if not running in Administrator Mode
body: <p>I cannot read from the registry unless I run my application in administrator mode.  I am building a preview handler, using the IPreviewHandler interface, and I require GUIDs for file types located in HKEY_CLASSES_ROOT.  </p>
  
  <p>How can I access this information without elevating my application to adminstrator.  I am using Delphi but happy for any sample code.</p>
  
  <p>Thanks,
  Phillip</p>