By default, the CheckBoxAlign property is exMiddleLeft. Use the CheckBoxAlign property to align the element's checkbox. The CheckElement event notifies your application once the user clicks the element's check-box. The ShowCheckBox property specifies whether the element displays the check-box. The Checked property indicates whether the element is checked or unchecked. The Background( exCheckBoxState0) Specifies the visual appearance for the check box in 0 state. The Background(exCheckBoxState1) Specifies the visual appearance for the check box in 1 state.