Sorry. I wasn't clear. When I said "hide" I meant make the window invisible and unable to receive focus. I also don't want it to show up in the taskbar.

The reason is because I have a program that is converting songs and it uses Windows Media Player to "listen" to the song digital (at 4x speed) and every couple of minutes WMP automatically focuses itself because the song is switching and it gets really annoying.

If someone can think of a different way to solve that problem, I'd love to hear it, but the only thing I can think of is to basically make the window non-existant.