property Group.CheckImage(State as Long) as Long
Retrieves or sets a value that indicates the image used by cells of checkbox type.

TypeDescription
State as Long A long expression that indicates the check's state: 0 means unchecked, 1 means checked, and 2 means partial checked.
Long A long expression that indicates the index of image used to paint the cells of check box types.

Use CheckImage and RadioImage properties to define icons for radio and check box cells.