By default, the ChevronImage property is -1. In this case, the control uses the default picture for a chevron. Use the ChevronImage property to assign a custom picture to the chevron. The index of the icon being displayed as a chevron should be zero based. Use the AllowChevron property to specify whether the control automatically displays a chevron/scroll when items on the menu bar do not fit the menu's client area. Use the Images method to assign icons to the control at runtime.