This loop will scan a directory, reading 4Kb's worth of directory
  entries at a time.  Note that you do *not* have to declare the result
  buffer as a FILEFINDBUF3 structure, and that in fact it is more
  convenient when you do not do so.

    //
    // char * pattern ;         /* This is the search pattern */
    //

    #define FINDBUFLEN 4096

    char FindBuf[FINDBUFLEN] ;  // Result buffer is 4Kb
    ULONG Dir = HDIR_CREATE ;
    ULONG SearchCount = FINDBUFLEN ;

    if (!DosFindFirst(pattern, &Dir, FILE_ARCHIVED|FILE_READONLY,
        FindBuf, FINDBUFLEN, &SearchCount, FIL_STANDARD)) {

        do {
            FILEFINDBUF3 * fb = (FILEFINDBUF3 *)FindBuf ;

            while (SearchCount--) {

                // Do something with fb here ...

                fb = (FILEFINDBUF3 *)( ((char *)fb) + fb->oNextEntryOffset ) ;
            }

            SearchCount = FINDBUFLEN ;

        } while (!DosFindNext(Dir, FindBuf, FINDBUFLEN, &SearchCount)) ;

        DosFindClose(Dir) ;
    }

  > JdeBP <
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