title: Inno Setup: Is there any way to set a registry key value when uninstalling?
body: <p>I know how to have Inno Setup create/manipulate registry keys and/or values on install and I know that you can delete a value, a key, etc when uninstalling. But is there any way to have Inno Setup actually change the value of a key when the uninstall process is done?</p>
  
  <p>The setup I'm creating changes the value of a dword key that another application uses to a value to 1, indicating it's installed, and when this application is removed I need the value to be restored to 0, indicating it's removal. Is this possible, without deleting the actual key/value?</p>