typedef struct sierra_adpcmwaveformat_tag {
        WAVEFORMATEX    wfx;
        WORD            wRevision;
} SIERRAADPCMWAVEFORMAT;

typedef SIERRAADPCMWAVEFORMAT   *PSIERRAADPCMWAVEFORMAT;

typedef SIERRAADPCMWAVEFORMAT NEAR      *NPSIERRAADPCMWAVEFORMAT;

typedef SIERRAADPCMWAVEFORMAT FAR       *LPSIERRAADPCMWAVEFORMAT;