---
title: ioCompletion
framework: Core Services
role: symbol
role_heading: Instance Property
platforms: [Mac Catalyst 17.0+, macOS 10.0+]
path: coreservices/fsrefparam/1565585-iocompletion
---

# ioCompletion

## Declaration

```occ
IOCompletionUPP ioCompletion;
```