typedef struct dvi_adpcmwaveformat_tag {
        WAVEFORMATEX    wfx;
        WORD            wSamplesPerBlock;
} DVIADPCMWAVEFORMAT;

typedef DVIADPCMWAVEFORMAT       *PDVIADPCMWAVEFORMAT;

typedef DVIADPCMWAVEFORMAT NEAR *NPDVIADPCMWAVEFORMAT;

typedef DVIADPCMWAVEFORMAT FAR  *LPDVIADPCMWAVEFORMAT;