The PartialCheck property specifies that the column supports partial check feature. By default, the PartialCheck property is False. Use the CellHasCheckBox property to associate a check box to a cell. Use the Def property to assign a cell box for the entire column. Use the CellState property to determine the cell's state. If the PartialCheck property is True, the CellState property has three states: 0 - Unchecked, 1 - Checked and 2 - Partial Checked. The control supports partial check feature for any column that your control contains. Use the Add method to add new columns to the control. The control fires the ViewItemStateStartChanging(exCheckItem) / ViewItemStateEndChanging(exCheckItem) event when the user clicks a checkbox or a radio button in the control.