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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* pdwDataLen;
BYTE* pData;
BYTE abMac[WMDM_MAC_LENGTH];
} OPAQUECOMMAND;
Members
guidCommand
GUID representing the requested command.
pdwDataLen
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
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 8.
See Also
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