If the HTMLCaption property is empty, the Caption property is displayed in the column's header. If the HTMLCaption property is not empty, the control uses it when displaying the column's header. Use the HeaderHeight property to change the height of the control's header bar. Use the HeaderVertical property to display vertically the column's caption. Use the HeaderAlignment property to align the caption in the column's header. Use the HeaderImage property to assign an icon to a column. The list of built-in HTML tags supported are here. Use the FormatLevel property to display multiple levels in the column's header.