title: Hide window using SetWindowPos doesnt hide combobox
body: <p>Im trying to hide a window using this line of code</p>
  
  <pre><code>SetWindowPos(d, IntPtr.Zero, 0, 0, 0, 0, 0x0001 | 0x0002 | 0x0004 | 0x0010 | 0x0080);
  </code></pre>
  
  <p>The SetWindowPos method is the one from user32.dll
  Most of the time it works fine, however if a combobox is open when Im hidding the window the list of the combobox remains visible.</p>
  
  <p>What am I doing wrong?</p>