GtkStyle ???

[DEVIN Florent <Florent Devin lifl fr>]

Hi,
This is the begining of a GtkStyle

   GtkStyleClass *klass;

   GdkColor fg[5];
   GdkColor bg[5];
   GdkColor light[5];
   GdkColor dark[5];
   GdkColor mid[5];
   GdkColor text[5];
   GdkColor base[5];
   
   GdkColor black;
   GdkColor white;
   GdkFont *font;
Someone can tell me on what they are in charge of ?
I know they are in charge of the color and the font. But how they affect
the widget ?
-- 
Florent DEVIN