mciQuerySysValue Parameter - pValue

pValue (PVOID) - in/out

Pointer to the return field. The type of data object this field points to is dependent on the attribute requested:

System Attribute

Data Type
MSV_CLOSEDCAPTION
BOOL
MSV_MASTERVOLUME
ULONG
MSV_HEADPHONES
ULONG
MSV_SPEAKERS
ULONG
MSV_WORKPATH
PSZ
MSV_SYSQOSVALUE
ULONG
MSV_SYSQOSERRORFLAG
ULONG

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