title: How does Qt program monitor keyboard while hiding?
body: <p>I create a Qt program and it normally stay as a tray on the right bottom of the screen. I need to use keyboard to active it, such as CTRL+ALT+A. But I can not find way to implement it. I searched a lot of information and it seems that using native windows API helps.</p>
  
  <p>I'm here asking is there anyone knows how to do this with Qt or with windows API.</p>