AddFontResource() vs AddFontResourceEx()
===

As can be seen [here][1], the function `AddFontResource()`requires that the app should send a `WM_FONTCHANGE` message to all top level windows in the system, but the [AddFontResourceEx()][2] function doesn't require this. Why the difference ? 


  [1]: http://msdn.microsoft.com/en-us/library/windows/desktop/dd183326%28v=vs.85%29.aspx
  [2]: http://msdn.microsoft.com/en-us/library/windows/desktop/dd183327%28v=vs.85%29.aspx