title: Windows 7: Property Handler works in Explorer but Not FileOpenDialog?
body: <p>Working on writing a custom property Handler for our custom file type in windows 7.  I have installed the Windows 7 SDK and built the sample Property Handler.  After registering the handler, it works great in Windows Explorer, but in the common file open dialog the custom values do not appear.  Does anyone know if there is something special I need to do to get the properties to appear in common dialogs?</p>
  
  <p>Explorer:
  <img src="https://i.stack.imgur.com/4wVPH.jpg" alt="enter image description here"></p>
  
  <p>File Open Dialog:
  <img src="https://i.stack.imgur.com/vIgBf.jpg" alt="enter image description here"></p>