title: How to detect the ctrl key is pressed twice if the program is minimized or in system tray
body: <p>How to detect the ctrl key is pressed twice if the program is minimized or in system tray</p>
  
  <p>I am trying to develop a c# program where the main form will be shown to the user when the control key is pressed twice. I found samples for hotkey combinations but this is not hotkey with combination, like control+ some other key. This is like google desktop app where the search box is displayed when control key is pressed twice. </p>