# AddCustomUISectionsEventArgs class

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

```cs
public class AddCustomUISectionsEventArgs : EventArgs
```

Used as Rhino.Render Custom Events args.

## Properties

- [EventType](https://developer.rhino3d.com/api/rhinocommon/type/rhino.render.addcustomuisectionseventargs/eventtype.md): The type of the event.
- [ExpandableContentUI](https://developer.rhino3d.com/api/rhinocommon/type/rhino.render.addcustomuisectionseventargs/expandablecontentui.md)