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. 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.