title: Privilege elevation on MSI uninstall with Installshield and user dialog
body: <p>I need to achieve the following:
  The uninstallation of an MSI should present a user dialog based on which Windows Installer knows how exactly to remove the software (in this case: The user must choose whether or not to remove databases as well).</p>
  
  <p>While running, the uninstall process will also trigger custom actions. All of these actions need administrative privileges.</p>
  
  <p>So I need to get "Program and Features" to present either full UI on "Remove" or the authenticate for administrative privileges dialog when hitting "Change" and then remove.</p>
  
  <p>How do I do this?</p>