typedef struct digiadpcmmwaveformat_tag {
        WAVEFORMATEX    wfx;
        WORD            wSamplesPerBlock;
} DIGIADPCMWAVEFORMAT;

typedef DIGIADPCMWAVEFORMAT       *PDIGIADPCMWAVEFORMAT;

typedef DIGIADPCMWAVEFORMAT NEAR *NPDIGIADPCMWAVEFORMAT;

typedef DIGIADPCMWAVEFORMAT FAR  *LPDIGIADPCMWAVEFORMAT;