typedef struct ima_adpcmwaveformat_tag {
        WAVEFORMATEX    wfx;
        WORD            wSamplesPerBlock;
} IMAADPCMWAVEFORMAT;

typedef IMAADPCMWAVEFORMAT       *PIMAADPCMWAVEFORMAT;

typedef IMAADPCMWAVEFORMAT NEAR *NPIMAADPCMWAVEFORMAT;

typedef IMAADPCMWAVEFORMAT FAR  *LPIMAADPCMWAVEFORMAT;