Each property of the Items object that has an argument ColIndex can use the column's caption to identify a column. Adding two columns with the same caption is accepted and these are differentiated by their indexes. To hide a column use the Visible property of the Column object. The column's caption is displayed using the following font attributes: HeaderBold, HeaderItalic, HeaderUnderline, HeaderStrikeout. Use the HTMLCaption property to specify the column's caption using built-in HTML tags. Use the Add method to add new columns and to specify their captions.