---
title: WritePipeTO
framework: IOKit
role: symbol
role_heading: Instance Property
platforms: [Mac Catalyst 18.4+, macOS 10.14+]
path: iokit/iousbinterfaceinterface942/2977258-writepipeto
---

# WritePipeTO

## Declaration

```occ
IOReturn (*WritePipeTO)(void *self, UInt8 pipeRef, void *buf, UInt32 size, UInt32 noDataTimeout, UInt32 completionTimeout);
```