---
title: IOUSBDevRequest
framework: IOKit
role: symbol
role_heading: Structure
platforms: [Mac Catalyst 18.4+, macOS 10.0+]
path: iokit/iousbdevrequest
---

# IOUSBDevRequest

## Declaration

```occ
typedef struct IOUSBDevRequest {
    ...
} IOUSBDevRequest;
```

## Overview

Overview Parameter block for control requests, using a simple pointer for the data to be transferred.

## Topics

### Instance Properties

- [bRequest](iokit/iousbdevrequest/1425442-brequest.md)
- [bmRequestType](iokit/iousbdevrequest/1425959-bmrequesttype.md)
- [pData](iokit/iousbdevrequest/1425983-pdata.md)
- [wIndex](iokit/iousbdevrequest/1425343-windex.md)
- [wLenDone](iokit/iousbdevrequest/1425789-wlendone.md)
- [wLength](iokit/iousbdevrequest/1425950-wlength.md)
- [wValue](iokit/iousbdevrequest/1425618-wvalue.md)