Set the background color in GTK1

[Kevin DeKorte <kdekorte yahoo com>]

I have an application that I am working on that I need to set a GtkWidow's 
background color. I have been able to do this in GTK2 pretty easily, but how 
do I change in GTK1? I'm writing my app to work in both GTK1 and GTK2 because 
it is a mozilla plugin and mozilla ships in both flavors.

Pointers or code snips would help alot.

Thanks,

Kevin