The Count property counts the columns in the collection. Use the Columns property to access the control's Columns collection. Use the Item property to access a column by its index or key. Use the Add method to add new columns to the control. Use the Remove method to remove a column. Use the Clear method to clear the columns collection. By default, the control contains no columns. Before adding new items, you need to add columns. Use the Add / ToString / Count method to add new columns to the control. Use the Caption property to change the column's caption. To hide a column use the Visible property of the Column object. Use the BeginUpdate and EndUpdate methods to maintain performance while adding new columns and items.