one more time about color (colour)

["konrad kwaskiewicz" <konrad kwaskiewicz gmail com>]

hi 
I need to get Color from selected point (x,y) on drawing area
(not using ColorButton, just knowing [x,y])
is there some function like drawingarea.getColor(int x,int y)
or any other possibility to take color from one point?
it would be grate if someone knows an example
thanks