make images appear under conditions

Hi,

I need to make images (red and yellow dots) when certain conditions on a table are met. They should appear on the grid in front of the data set and on the details' tabpage for each dataset meeting the criteria (based on a table field entry).

I tried to write a methode on the table directly and catch it in a windows controll on the grid. This did not work. I tried display options in the forms datasource. No effect.

I need some more hints to try things.

Thanks.