# UserInterfaceCheckBox class

Namespace: [Rhino.UI](https://developer.rhino3d.com/api/rhinocommon/namespace/rhino.ui.md) · Assembly: [RhinoCommon](https://developer.rhino3d.com/api/rhinocommon/assembly/rhinocommon.md)

```cs
public class UserInterfaceCheckBox : UserInterfaceControl
```

Draws a check box with optional text beside it. Clicking anywhere on the control changes the state and raises the CheckedChanged event.

## Constructors

- [UserInterfaceCheckBox](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfacecheckbox/ctor.md): (2 overloads)

## Properties

- [Checked](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfacecheckbox/checked.md): Convenience for the two state case. Checked is true when the state is On, and an indeterminate check box is not checked.
- [CheckState](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfacecheckbox/checkstate.md): State of the check box. Setting the state does not raise CheckedChanged; that is only for a state the user changed by clicking.

## Methods

- [OnCheckedChanged](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfacecheckbox/oncheckedchanged.md): Called after a click has changed the state. A click turns an indeterminate check box on. The default implementation raises the CheckedChanged event.

## Events

- [CheckedChanged](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfacecheckbox/checkedchanged.md): Event triggered when a click changes the state of the check box

## Inherited Members

- From [UserInterfaceControl](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfacecontrol.md): [BackgroundColor](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfacecontrol/backgroundcolor.md), [HorizontalAlignment](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfacecontrol/horizontalalignment.md), [Location](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfacecontrol/location.md), [Size](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfacecontrol/size.md), [Text](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfacecontrol/text.md), [TextColor](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfacecontrol/textcolor.md), [TextHeight](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfacecontrol/textheight.md), [TextHorizontalAlignment](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfacecontrol/texthorizontalalignment.md), [TextVerticalAlignment](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfacecontrol/textverticalalignment.md), [TrackingPoint](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfacecontrol/trackingpoint.md), [VerticalAlignment](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfacecontrol/verticalalignment.md), [ComputedRectangle](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfacecontrol/computedrectangle.md), [SetSvg](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfacecontrol/setsvg.md)
- From [UserInterfaceObjectBase](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfaceobjectbase.md): [BoundToActiveView](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfaceobjectbase/boundtoactiveview.md), [HasKeyboardFocus](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfaceobjectbase/haskeyboardfocus.md), [Tooltip](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfaceobjectbase/tooltip.md), [Visible](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfaceobjectbase/visible.md), [IsMouseOver](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfaceobjectbase/ismouseover.md), [IsRegistered](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfaceobjectbase/isregistered.md), [OnDraw](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfaceobjectbase/ondraw.md), [OnMouseClick](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfaceobjectbase/onmouseclick.md), [OnMouseDoubleClick](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfaceobjectbase/onmousedoubleclick.md), [OnMouseDown](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfaceobjectbase/onmousedown.md), [OnMouseEnter](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfaceobjectbase/onmouseenter.md), [OnMouseLeave](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfaceobjectbase/onmouseleave.md), [OnMouseMove](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfaceobjectbase/onmousemove.md), [OnMouseUp](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfaceobjectbase/onmouseup.md), [OnRunCommand](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfaceobjectbase/onruncommand.md), [RegisterForAllDocuments](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfaceobjectbase/registerforalldocuments.md), [RunCommand](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfaceobjectbase/runcommand.md), [Unregister](https://developer.rhino3d.com/api/rhinocommon/type/rhino.ui.userinterfaceobjectbase/unregister.md)