The EditType property specifies the control's type. Use the AddItem method to add new items to the control's predefined list, if the editor is of drop down type. Use the HasCheckBox property to assign a check box to the control.  Use the AddButton method to add new buttons to the editor. The Value property of the control determines the control's value, and it determines the caption that control displays based on the control's type. The EditTypeEnum type defines all types of supported editors and how the Value property is interpreted.