I have no idea how to program it, but here a small hint:
Nokia Lumia Beamer (Windows Store Shop) http://www.windowsphone.com/de-at/store ... cf0582043f
There you can sent mobile phone photos to a TV (with internet) or computer by internet. If you change the photo on your mobile phone, it also change it (with a little time difference) at the computer.
How it works:
Phone -> sent invitation/link to the computer -> computer get access -> phone uploads picture to Microsoft server -> computer downloads from Microsoft server
so you need a third party (server), but I doubt that it will work fluently, because of the internet connection