title: how to hide a tree item in the CTreeCtrl?
body: <p>Is it possible to hide an item (and the complete subtree under it) so that the item is actually there in the tree but its invisible.</p>
  
  <p>For example, for the following tree :</p>
  
  <pre><code>A
  |
  |---B
  |
  |---C
  </code></pre>
  
  <p>I want to hide the item B so that it looks like</p>
  
  <pre><code>A
  |
  |---C
  </code></pre>
  
  <p>Item B is still a child of A but is not visible in the tree.</p>
  
  <p>Is it possible to do so. If yes, how??</p>
  
  <p>note: I can do it by inserting and deleting in tree but in my case this hidding/showing is too frequent hence wants to avoid.</p>