title: Replacing Windows 7's logon screen completely?
body: <p>In <strong>Windows XP</strong> it was possible to substitute the logon interface for your own GINA implementation that could add additional features to the logon screen as well as implement some organisation-specific features.</p>
  
  <p>I've looked at a number of MSDN articles and they all suggest that it is impossible to achieve that with the new logon system (Windows Vista and newer).</p>
  
  <p>However, at the login screen or every time the SAS sequence is invoked, the <code>LogonUI</code> process starts up and provides a GINA-like interface for the user to interact with.</p>
  
  <p><strong>I was wondering, is it possible to roll your own implementation of</strong> <code>LogonUI</code> <strong>for the purpose of replacing the login/SAS UI?</strong> I couldn't find any articles on it, but I think it is a viable option.</p>