System.Windows.Forms 1.0.5000.0 2.0.0.0 System.Enum Multiple methods in , , and use this enumeration. Use an indeterminately checked control when you do not want to set a default value. Specifies the state of a control, such as a check box, that can be checked, unchecked, or set to an indeterminate state. Field System.Windows.Forms.CheckState The control is checked. 1.0.5000.0 2.0.0.0 Field System.Windows.Forms.CheckState The control is indeterminate. An indeterminate control generally has a shaded appearance. 1.0.5000.0 2.0.0.0 Field System.Windows.Forms.CheckState The control is unchecked. 1.0.5000.0 2.0.0.0