.... (*)
http://sites.google.com/site/chir21/home/CEC-Tray
(*) Requires the Pulse-Eight USB-CEC adapter. Check if your HDTV supports HDMI-CEC.
No more hassle with dedicated mediacenter remote controls and special infrared or Bluetooth receivers for your HTPC. Instead, HDMI-CEC Tray makes use of your HDTV's built-in CEC technology to control your PC. You will be able to control Mediacenter, VLC, MPC-HC, MediaPortal or XBMC as well as Powerpoint, to name a few.
With HDMI-CEC Tray, you can navigate your HTPC menus, play and pause music, or fast-forward movies using only the TV remote. ...