RadCheckBox is designed to provide an interface element that can represent an On or Off state using a check mark. To learn how to manage the states of RadCheckBox see Handling Telerik RadCheckBox States. In DataBinding with the Telerik RadCheckBox you will learn how to leverage the DataBinding features of RadCheckBox. In addition, RadCheckBox, like all of the other controls in Telerik UI for WinForms suite, has versatile design options. RadCheckBox supports three states. This is controlled by the IsThreeState property. If it is set to false, the ToggleState property, which determines the current state of the check mark, can be On or Off . Otherwise, it can be set to On , Off , or Indeterminate .