Remote Desktop on Surface RT

I need assistance with the native Remote Desktop app with my Surface RT.

I've been able to connect to my home PC (win7) using the Remote Desktop app on the Surface. However, it ended up not fulfilling my needs as I pretty much want to control the movies playing in VLC from it, like a remote control. When I successfully connect to my desktop PC from my Surface, my desktop PC screen goes blank.

Also, is it possible to use the Remote Desktop app on the Surface to get into my home desktop PC, while at work? It seems as though I must be on the same network.