CGBitmapContextCreate with kCGImageAlphaNone

Question

I desperately need to create a CGContextRef WITHOUT an alpha channel. Unfortunately, with Core Graphics you CANNOT specify kCGImageAlphaNone with CGBitmapCreateContext.

Can someone PLEASE post a working example of how I can create a CGContextRef WITHOUT an alpha channel?

The reason I need this is because I'm ultimately trying to call CGImageCreateWithMaskingColors, which, of course, will NOT work if the CGImageRef provided has an alpha channel.

Please post a working example. If you do you can relish in the fact that you will be on the cutting edge and will be the FIRST person to do so! Please post!