When set, this property causes divider bars to be displayed between columns. Like DATA-COLUMNS, each time you assign a value to this property, you establish the divider for a new column.
The value assigned is the width of the divider, in pixels. A width of zero means that there will be no divider. The divider appears after the column, immediately before the beginning of the next column (there is a small space between the divider and the next column's text). To reset the list of dividers, assign a value of -1. The divider's color is the shadow color of the list box (usually dark gray or black).