This structure contains fields for the MCI_OPEN message used with amplifier-mixer devices.
typedef struct _MCI_AMP_OPEN_PARMS { HWND hwndCallback; /* Window handle. */ USHORT usDeviceID; /* Device ID. */ USHORT usReserved0; /* Reserved field. */ PSZ pszDeviceType; /* Device name from SYSTEM.INI. */ PSZ pszElementName; /* File name or NULL. */ PSZ pszAlias; /* Optional device alias. */ PVOID pDevDataPtr; /* Device data. */ } MCI_AMP_OPEN_PARMS; typedef MCI _ AMP _ OPEN _ PARMS * PMCI _ AMP _ OPEN _ PARMS ;