Windows Media Player SDK - Visualizations

Hi,

I've just started using the WMP SDK v9.0. I'm using the
media player activeX control embedded in a VC++
application. I've manged to get my head around the
majority of it and am happily using the interfaces it
provides to manage the playing etc of my media items. One
question though. Is it possible, and if so how, to change,
programmatically, the style of the visualization it
displays for audio tracks. Obviously I can change them
manually using the Media Player front end menu option, but
would like to change them automatically from my own custom
program. Even if I have to fiddle around changing registry entries, thats fine.

Any help much appreciated. Thanks in advance.

Simon