title: What is the purpose of the system owned top-level windows that have the WS_CHILD style?
body: <p>In the <a href="https://docs.microsoft.com/en-us/windows/desktop/api/winuser/nf-winuser-enumwindows" rel="nofollow noreferrer">EnumWindows</a> documentation, it states:</p>
  
  <blockquote>
    <p>The EnumWindows function does not enumerate child windows, with the exception of a few top-level windows owned by the system that have the WS_CHILD style.</p>
  </blockquote>
  
  <p>Does anyone know what the purpose of these windows are for?</p>