[gtkada] get the color of a specific pixel

[yoann toussaint]

hello,
in my paint'like I am implementing a shape fill ('pot de peinture' in 
french)

and I would like to get the gdk_color of the pixel at coordinates x,y on 
my drawing area.

Is anyone knows how to get that ?

and why there is a field named 'pixel' in gdk_color type :

type Gdk_Color is
      record
         Pixel : Gulong;
         Red   : Gushort;
         Green : Gushort;
         Blue  : Gushort;
      end record;

thanks,
yoann