Set Top Box
Media Center can control your set top box if you have a Media Center Remote and transceiver.
Go to MC's Tools > Options > Remote control. There click the "Next >" button. That will show you a page called "Selection". Uncheck all (unless you also want to set up other things) except the last item, "Set-top box numbers" and press Next >. Now you are ready to have MC learn your Set-top box codes. Keep pressing the requested number button on the remote provided by your cable or satellite company until that button is learned.
Related articles: Television Setup