# MultiColumnHeader.HeaderCallback

> Delegate used for events from the MultiColumnHeader.

## Definition

* **Type:** Delegate
* **Namespace:** [UnityEditor.IMGUI.Controls](/engine/7000.0/script-reference/unityeditor/imgui/controls.md)
* **Assembly:** UnityEditor.CoreModule

```csharp
public delegate void MultiColumnHeader.HeaderCallback(MultiColumnHeader multiColumnHeader)
```