This program can be very useful if you usually work with lots of windows and you don't want your desktop to be a mess. Use the key-combination and save some time because you will not have to go to the icon to do it.
It's vrey easy to use. Run the program and from that moment on, each time you press 'CTRL+ALT+left click', the active window will disappear.
Those windows will be restored by clicking an small icon placed next to the clock in the system tray.
Furthermore, the program allows you to set a different key combination and to add more functions and hotkeys for other purposes.