---
title: kIOUserVideoDriverUserClientType
framework: VideoDriverKit
role: symbol
role_heading: Macro
platforms: [driverkit 27.0+]
path: videodriverkit/kiouservideodriveruserclienttype
---

# kIOUserVideoDriverUserClientType

User client type required for connection to the Host.

## Declaration

```occ
#define kIOUserVideoDriverUserClientType
```

## Overview

Overview Passed as an argument to NewUserClient when Core Video Host is creating a new user client.