# IGH_DocumentObject.PingDocumentEventHandler delegate

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

```cs
public delegate IGH_DocumentObject.PingDocumentEventHandler
```

**Signature:**

```cs
void IGH_DocumentObject.PingDocumentEventHandler(IGH_DocumentObject sender, GH_PingDocumentEventArgs e)
```

**Parameters:**

- `sender` ([IGH_DocumentObject](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.igh-documentobject.md))
- `e` ([GH_PingDocumentEventArgs](https://developer.rhino3d.com/api/gh1/type/grasshopper.kernel.gh-pingdocumenteventargs.md))