---
title: AXObserverCallbackWithInfo
framework: Application Services
role: symbol
role_heading: Type Alias
platforms: [macOS 10.9+]
path: applicationservices/axobservercallbackwithinfo
---

# AXObserverCallbackWithInfo

## Declaration

```swift
typealias AXObserverCallbackWithInfo = (AXObserver, AXUIElement, CFString, CFDictionary, UnsafeMutableRawPointer?) -> Void
```

## Parameters

- `observer`: An AXObserverRef object to observe the notifications.
- `element`: The accessibility object.
- `notification`: The name of the notification to observe.
- `info`: The coresponding notification information.
- `refcon`: Application-defined data specified when registering the observer for notification

## See Also

### Callbacks

- [AXObserverCallback](applicationservices/axobservercallback.md)