I'm glad you got something to work.

I'm still not happy with it not working on all PC's for my own library example, so I'm looking at this API:
DeviceIoControl
With the constant: IOCTL_VIDEO_SET_DISPLAY_BRIGHTNESS
http://msdn.microsoft.com/en-us/libr...04(VS.85).aspx

If you don't mind I'll post it here, if I can make it work.
That way future searchers will find both answers in one spot. Or not. lol