By default, the DisplayExpandIcon property is True. Use the DisplayExpandIcon property to hide the icon in the group caption that indicates whether a group is expanded or collasped. Use the ExpandIcon property to specify the icons used for expanded/collased groups. Use the Expanded property to expand a group. The control fires the ExpandGroup event when the user clicks the group's caption. Use the Caption property to specify the caption of the group. Use the ExpandOnClick property to specify whether the user can expand or collapse the groups by clicking the caption of the group.