# ICallbackSource interface

Namespace: [Eto](https://eto.picoe.ca/api/namespace/eto.md) · Assembly: [Eto](https://eto.picoe.ca/api/assembly/eto.md)

```cs
public interface ICallbackSource
```

Interface to get the callback object for a widget

**Derived types:** [Control](https://eto.picoe.ca/api/type/eto.forms.control.md), [Widget](https://eto.picoe.ca/api/type/eto.widget.md)

## Properties

- [Callback](https://eto.picoe.ca/api/type/eto.icallbacksource/callback.md): Gets an instance of an object used to perform callbacks to the widget from handler implementations