opaquecommand.md

title	description	ms.assetid	keywords	topic_type	api_name	api_location	api_type	ms.topic	ms.date
OPAQUECOMMAND structure	The OPAQUECOMMAND structure contains data for commands that are passed through Windows Media Device Manager to a device but are not intended to be acted upon by Windows Media Device Manager.	5b39cf07-2816-4615-a754-e3f0c57bf4ce	OPAQUECOMMAND structure windows Media Device Manager structure windows Media Device Manager	apiref	OPAQUECOMMAND	wmdm.idl	HeaderDef	reference	05/31/2018

OPAQUECOMMAND structure

The OPAQUECOMMAND structure contains data for commands that are passed through Windows Media Device Manager to a device but are not intended to be acted upon by Windows Media Device Manager.

Syntax

typedef struct OPAQUECOMMAND {
  GUID  guidCommand;
  DWORD dwDataLen;
  BYTE  *pData;
  BYTE  abMAC[20];
} ;

Members

guidCommand

GUID representing the requested command.

dwDataLen

Length of the data to which pData points, in bytes.

pData

Data required to execute the command, and/or data returned by the command.

abMAC[20]

This message authentication code (MAC) should include the guidCommand member, the data to which pdwDataLen points, and the data to which pData points, if any. If pData is NULL, it must not be included in the MAC. WMDM_MAC_LENGTH is defined as 20.

Requirements

Requirement	Value
Header	Wmdm.idl

See also

IMDSPDevice::SendOpaqueCommand

IMDSPStorage::SendOpaqueCommands

IWMDMDevice::SendOpaqueCommand

IWMDMStorage::SendOpaqueCommand

Structures