The Columns property returns the Columns collection. 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. The Items property returns the Items collection. The Add / Count / Item.ToString / Items.ToString method adds a Item object(s) to the collection and returns a reference to the newly created object. The Value property specifies the cell's value. The HasCheckBox property retrieves or sets a value indicating whether the cell has a checkbox associated or not. The Items property returns the item's child collection.