---
title: kCFFileDescriptorWriteCallBack
framework: corefoundation
role: symbol
role_heading: Global Variable
path: corefoundation/kcffiledescriptorwritecallback
---

# kCFFileDescriptorWriteCallBack

Identifies the write callback.

## Declaration

```swift
var kCFFileDescriptorWriteCallBack: CFOptionFlags { get }
```

## See Also

### Constants

- [kCFFileDescriptorReadCallBack](corefoundation/kcffiledescriptorreadcallback.md)