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# tIOUSBDeviceRequestTypeValue

Constants indicating the type of request to make from a device.

```
enum tIOUSBDeviceRequestTypeValue : unsigned int;
```

## Topics

### Getting the Request Type

[`kIOUSBDeviceRequestTypeValueStandard`](/documentation/USBDriverKit/tIOUSBDeviceRequestTypeValue/kIOUSBDeviceRequestTypeValueStandard)

A standard device request.

[`kIOUSBDeviceRequestTypeValueClass`](/documentation/USBDriverKit/tIOUSBDeviceRequestTypeValue/kIOUSBDeviceRequestTypeValueClass)

A class-specific device request.

[`kIOUSBDeviceRequestTypeValueVendor`](/documentation/USBDriverKit/tIOUSBDeviceRequestTypeValue/kIOUSBDeviceRequestTypeValueVendor)

A vendor-specific device request.


---

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