Comparing pictures

Hi all,

I'm used to drawing icons in Listbox cells.

I need to compare these icons with pictures, in order to determine what 
action should fire when clicked.

I know coordinates of each icon in the cell.

1) Is the RGBSurface and Pixel comparison a good way?

2) How to get an RGBSurface of a cell area in the CellClick event? I 
can't figure out how to get a Graphics object of the area and then a 
RGBSurface.

All suggestion welcome, including MBS plugins use.

TIA for your help.

-- 
Jean-Luc Arnaud