title: iPhone Development - Non documented UIProgressHUD class
body: <p>I've only heard about what UIProgressHUD class do, but i cannot find the implementation of this class or any documentation. Reference to this class can be found in "The iPhone Developer's Cookbook 1st Edition" book, and other articles on the internet:</p>
  
  <blockquote>
    <p><a href="http://www.cocoadev.com/index.pl?UIProgressHUD" rel="noreferrer">http://www.cocoadev.com/index.pl?UIProgressHUD</a></p>
    
    <p><a href="http://blogs.oreilly.com/iphone/2008/02/using-a-progress-heads-up-disp.html" rel="noreferrer">http://blogs.oreilly.com/iphone/2008/02/using-a-progress-heads-up-disp.html</a></p>
  </blockquote>
  
  <p>... and maybe others. I just want to know if i can still use this class somehow. Does anyone has the .h and .m class files? Or is there any other class that does something what UIProgressHUD is suppose to do (open an alert like window showing progress indicator with a message).</p>
  
  <p>Thanks.
  Mustafa</p>