title: How to display UI on logon screen in Windows 7
body: <p>I would like to display an UI that interacts with user on pre-logon screen (the screen where users usually enter their username/password)<br>
  I read that the architecture of Winlogon packages has changed and will not help me in Windows 7.
  I was referred to use WTS functions, however I am still not clear on how to use them or which ones.</p>
  
  <p>I already created a Service which brings up a notepad.exe (for now), however I need to trigger this Service when user is in pre-logon screen. I am not sure what or how to implement that.</p>