Then you may put in column 3 imagecontrols and do use the field from table only to set current control .
For Image controls in the picture property set predefined gif file and include that gif files in project .
Then you don't need general field in the table bat you need some field like
imgType and then use that field in
.grcColumnImage.DYNAMICCURRENTCONTROL =IIF(MYTABLE.IMGTYPE= 1,image1,iif(MYTABLE.IMGTYPE =2,image2,image3))
.grcColumnImage.Sparse = .f.
.grcColumnImage.ControlSource = ""