---
title: WriteStreamsPipeTO
framework: IOKit
role: symbol
role_heading: Instance Property
platforms: [Mac Catalyst 18.4+, macOS 10.14+]
path: iokit/iousbinterfaceinterface942/2977260-writestreamspipeto
---

# WriteStreamsPipeTO

## Declaration

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