title: How to hide only the Close (x) button?
body: <p>I have a modal dialog, and need to hide the Close (X) button, but I cannot use 
  <code>ControlBox = false</code>, because I need to keep the Minimize and Maximize buttons.</p>
  
  <p>I need to hide just Close button, is there any way to do that?</p>
  
  <p>Thanks a lot!</p>
  
  <p>Update: I had permission to disable it, which is simpler :) Thanks all!</p>