title: Remove NSWindow content view
body: <p>I set the content view for the following window and now i want to remove that content view and set it to something else.  I tried just setting the content view to another view and that did not work, how can i just remove it? thanks!         </p>
  
  <pre><code>    controlFilterBox = [[MoveFilter alloc] initWithFrame:helpWindow.frame];
      [helpWindow setContentView:controlFilterBox];
      [controlFilterBox release];
  </code></pre>