The ApplyFilter method updates the control's content once that user sets the filter using the Filter and FilterType properties. Use the ClearFilter method to clear the control's filter. Use the DisplayFilterButton property to show the filter drop down button in the column's caption. Use the FilterInclude property to specify whether the child items should be included to the list when the user applies the filter. Use the ShowFilter method to show programmatically the column's drop down filter window.