---
title: RegisterReferenceResolvedCallback(Action<T>)
product: Unity Editor
version: '7000.0'
latest_version: '7000.0'
status: This page documents version 7000.0. The latest version is 7000.0.
canonical: https://docs.unity.com/en-us/engine/7000.0/script-reference/unityengine/uielements/visualelementreference1/registerreferenceresolvedcallback
latest_url: https://docs.unity.com/en-us/engine/7000.0/script-reference/unityengine/uielements/visualelementreference1/registerreferenceresolvedcallback.md
last_updated: 2026-10-07
generated_at: 2026-11-12T03:10:56.728Z
locale: en-us
---

# RegisterReferenceResolvedCallback(Action<T>)

> Registers a callback for when the reference is resolved from the document. When you register a callback, if the reference is already resolved, the callback is immediately invoked.

## Definition

* **Type:** Method
* **Namespace:** [UnityEngine.UIElements](/engine/7000.0/script-reference/unityengine/uielements.md)
* **Assembly:** UnityEngine.UIElementsModule

```csharp
public void RegisterReferenceResolvedCallback(Action<T> callback)
```

### Parameters

**** (\[Action\<T>]\(https\://learn.microsoft.com/dotnet/api/system.action-1)): The callback to invoke when the reference is resolved.