You can use the Add method to specify the group's caption, when the group is added to groups collection. Use the CaptionFormat property to allow built-in HTML tags in the group's caption. The control fires the SelectGroup event when the user clicks the caption of the group. Use the Bold, Italic, Underline or StrikeOut property to define the font for caption of the group. Use the <img> HTML tag to insert icons inside the item's caption, if the CaptionFormat property is exHTML. For instance, the "some image <img>1</img> other image <img>2</img> rest of text", displays combined text and icons in the item's caption. Use the Images method to load icons at runtime.