title: pywinauto does not find Win32 elements in mixed backend applications under virtualbox
body: <p>pywinauto is not finding win32 backend elements that are children of aui backend elements if the script is run in virtualbox</p>
  
  <p>We have a <code>WinForm ComboBox</code> that's on invoke pops a <code>Win32 ComboLBox</code> with <code>ListItems</code> in it. When using pywinauto default approach on local machine
  pywinauto is not finding win32 backend elements that are children of aui backend elements if the script is run in virtualbox</p>
  
  <p>We have a <code>WinForm ComboBox</code> that's on invoke pops a <code>Win32 ComboLBox</code> with <code>ListItems</code> in it. When using pywinauto default approach on local machine</p>
  
  <pre><code>app.Dialog.ComboLBox.select('myitem')
  </code></pre>
  
  <p>it works perfectly well. When using same code on virtualbox VM (MSEdge on Win10 (x64) from microsoft website), the items under <code>ComboLBox</code> object are not seen by pywinauto. <em>Inspect</em> lists them, <code>.ComboLBox.texts()</code> returns a list of strings, but <code>.ComboLBox.children()</code> is empty.</p>
  
  <p>Is there any workaround for such scenarios? I can hardly imagine many usages of automation tools directly on your desktop as all moves towards VMs and cloud these days.</p>