# setupDragAndDrop

> Called when a drag operation starts in this collection view.

## Definition

* **Type:** Event
* **Namespace:** [UnityEngine.UIElements](/engine/6000.5/script-reference/unityengine/uielements.md)
* **Assembly:** UnityEngine.UIElementsModule

```csharp
public event Func<SetupDragAndDropArgs, StartDragArgs> setupDragAndDrop
```