---
title: KUNCUserNotificationCallBack
framework: Kernel
role: symbol
role_heading: Type Alias
platforms: [macOS 10.0+]
path: kernel/kuncusernotificationcallback
---

# KUNCUserNotificationCallBack

## Declaration

```occ
typedef void (*KUNCUserNotificationCallBack)(int contextKey, int responseFlags, const void *xmlData);
```