---
title: "Platform::CallbackContext Enumeration"
ms.date: "12/30/2016"
ms.topic: "reference"
f1_keywords: ["VCCORLIB/Platform::CallbackContext"]
helpviewer_keywords: ["Platform::CallbackContext Enumeration"]
ms.assetid: 60e0c7cb-5d8f-482a-bdca-ca9335ae4899
---
# Platform::CallbackContext Enumeration

Specifies the thread context in which a callback function (event handler) executes.

## Syntax

```cpp
enum class CallbackContext {};
```

### Members

|Type Code|Description|
|---------------|-----------------|
|Any|The callback function can execute on any thread context.|
|Same|The callback function can execute on only the thread context that started the asynchronous operation.|

### Requirements

**Minimum supported client:** Windows 8

**Minimum supported server:** Windows Server 2012

**Namespace:** Platform

**Metadata:** platform.winmd