T220p custom source switching

hey all!!

i go my new t220p, and i'm pretty happy with it

i have connected the monitor to my pc and to my cable tv and it works pretty good (well, it does not support full hd, but i'm ok with that)

the problem is i'm too lazy to push the source change button every time i want to go from my tv to pc and backwards..
i know the magic tune software has this "source select" feature. so i learn that it's possible to do it in some alternative, keyboard hotkey bounded way , for which i will need one of the followings:

- ready software (command line application will do it)
- some information about the drivers api, so i could do it myself (maybe)

i would be glad if you'll be able to help me with these two possible solutions to my little problem