# Instances.CanvasDestroyedEventHandler delegate

Namespace: [Grasshopper](https://developer.rhino3d.com/api/gh1/namespace/grasshopper.md) · Assembly: [Grasshopper](https://developer.rhino3d.com/api/gh1/assembly/grasshopper.md)

```cs
public delegate Instances.CanvasDestroyedEventHandler
```

**Signature:**

```cs
void Instances.CanvasDestroyedEventHandler(GH_Canvas canvas)
```

**Parameters:**

- `canvas` ([GH_Canvas](https://developer.rhino3d.com/api/gh1/type/grasshopper.gui.canvas.gh-canvas.md))