typedef struct adpcmewaveformat_tag {
        WAVEFORMATEX    wfx;
        WORD            wSamplesPerBlock;
} ADPCMEWAVEFORMAT;

typedef ADPCMEWAVEFORMAT                *PADPCMEWAVEFORMAT;

typedef ADPCMEWAVEFORMAT NEAR   *NPADPCMEWAVEFORMAT;

typedef ADPCMEWAVEFORMAT FAR    *LPADPCMEWAVEFORMAT;