# GH_Stack.GH_StackEventDelegate delegate

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

```cs
public delegate GH_Stack.GH_StackEventDelegate
```

**Signature:**

```cs
void GH_Stack.GH_StackEventDelegate(GH_Stack sender)
```

**Parameters:**

- `sender` ([GH_Stack](https://developer.rhino3d.com/api/gh1/type/grasshopper.gui.stacks.gh-stack.md))