typedef struct _MMIOINFO
{
        
        DWORD           dwFlags;        
        FOURCC          fccIOProc;      
        LPMMIOPROC      pIOProc;        
        UINT            wErrorRet;      
        HTASK           htask;          

        
        LONG            cchBuffer;      
        HPSTR           pchBuffer;      
        HPSTR           pchNext;        
        HPSTR           pchEndRead;     
        HPSTR           pchEndWrite;    
        LONG            lBufOffset;     

        
        LONG            lDiskOffset;    
        DWORD           adwInfo[3];     

        
        DWORD           dwReserved1;    
        DWORD           dwReserved2;    
        HMMIO           hmmio;          
} MMIOINFO, *PMMIOINFO, NEAR *NPMMIOINFO, FAR *LPMMIOINFO;