change the base colour in a gtkcombo

[Richard Gipps <rgipps netspace net au>]

Hi, I have been trying using the function	gtk_widget_set_style( ) to change 
the base colour on a gtkcombo box but I can't seen to get it to change 
colour.  I have used the same function on a gtkentry box and it worked 
fine.  Anyone got any ideas??

Richard.