# Tool class

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

```cs
public class Tool : BindableWidget
```

Base class for tool items on a [ToolBar](https://eto.picoe.ca/api/type/eto.forms.toolbar.md)

**Derived types:** [ToolBar](https://eto.picoe.ca/api/type/eto.forms.toolbar.md), [ToolItem](https://eto.picoe.ca/api/type/eto.forms.toolitem.md)

## Methods

- [OnLoad](https://eto.picoe.ca/api/type/eto.forms.tool/onload.md): Called when the tool item is assigned to a control/window
- [OnPreLoad](https://eto.picoe.ca/api/type/eto.forms.tool/onpreload.md): Called before the tool item is assigned to a control/window
- [OnUnLoad](https://eto.picoe.ca/api/type/eto.forms.tool/onunload.md): Called when the tool item is removed from a control/window

## Inherited Members

- From [BindableWidget](https://eto.picoe.ca/api/type/eto.forms.bindablewidget.md): [Bindings](https://eto.picoe.ca/api/type/eto.forms.bindablewidget/bindings.md), [DataContext](https://eto.picoe.ca/api/type/eto.forms.bindablewidget/datacontext.md), [IsDataContextChanging](https://eto.picoe.ca/api/type/eto.forms.bindablewidget/isdatacontextchanging.md), [Parent](https://eto.picoe.ca/api/type/eto.forms.bindablewidget/parent.md), [Parents](https://eto.picoe.ca/api/type/eto.forms.bindablewidget/parents.md), [DataContextChanged](https://eto.picoe.ca/api/type/eto.forms.bindablewidget/datacontextchanged.md), [FindParent](https://eto.picoe.ca/api/type/eto.forms.bindablewidget/findparent.md), [OnDataContextChanged](https://eto.picoe.ca/api/type/eto.forms.bindablewidget/ondatacontextchanged.md), [Unbind](https://eto.picoe.ca/api/type/eto.forms.bindablewidget/unbind.md), [UpdateBindings](https://eto.picoe.ca/api/type/eto.forms.bindablewidget/updatebindings.md)
- From [Widget](https://eto.picoe.ca/api/type/eto.widget.md): [ControlObject](https://eto.picoe.ca/api/type/eto.widget/controlobject.md), [Handler](https://eto.picoe.ca/api/type/eto.widget/handler.md), [ID](https://eto.picoe.ca/api/type/eto.widget/id.md), [IsDisposed](https://eto.picoe.ca/api/type/eto.widget/isdisposed.md), [NativeHandle](https://eto.picoe.ca/api/type/eto.widget/nativehandle.md), [Platform](https://eto.picoe.ca/api/type/eto.widget/platform.md), [Properties](https://eto.picoe.ca/api/type/eto.widget/properties.md), [Style](https://eto.picoe.ca/api/type/eto.widget/style.md), [StyleChanged](https://eto.picoe.ca/api/type/eto.widget/stylechanged.md), [Dispose](https://eto.picoe.ca/api/type/eto.widget/dispose.md), [GetCallback](https://eto.picoe.ca/api/type/eto.widget/getcallback.md), [Initialize](https://eto.picoe.ca/api/type/eto.widget/initialize.md), [OnStyleChanged](https://eto.picoe.ca/api/type/eto.widget/onstylechanged.md), [ToString](https://eto.picoe.ca/api/type/eto.widget/tostring.md)