iSysValue (USHORT) - input

The system attribute. See mciQuerySysValue for a list of possible system attributes.

pValue (PVOID) - input

Pointer to a value to be set. The type of data object this points to is dependent on the attribute requested. See mciQuerySysValue for a list of data types.

rc (BOOL) - returns

Return code.

TRUE

If the function succeeds.
FALSE
If the function fails.

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