---
title: installAVCCommandHandler
framework: kernel
role: symbol
role_heading: Instance Method
path: kernel/iofirewireavctargetspace/1571622-installavccommandhandler
---

# installAVCCommandHandler

## Declaration

```occ
virtual IOReturn installAVCCommandHandler(IOFireWireAVCProtocolUserClient *userClient, IOFireWireAVCTargetCommandHandlerCallback callBack, OSAsyncReference64 asyncRef, UInt32 subUnitTypeAndID, UInt32 opCode, uint64_t userCallBack, uint64_t userRefCon);
```