Does control support merging cells?
The Items object provides properties like ItemDivider, ItemDividerLine helps you to merge cells of the row into a single cell. The setup installs a sample VB\Divider that helps you to understand how ItemDivider works. Also, the ItemDivider property helps you to group items in the control. The divider items are not scrolled when the user drags the horizontal scroll bar so the groups titles will be visible most of the time. The ItemDivider property specifies the index of cell being displayed instead displaying the entire item.