C Language and Libraries Help (clang.hlp) (Table of Contents; Topic list)
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_dos_read
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─────Run-Time Library───────────────────────────────────────────────────────
 
  Include:   <dos.h>, <errno.h>
 
  Syntax:    unsigned _dos_read( int handle, void __far *buffer,
                                 unsigned count, unsigned *numread );
 
  Returns:   0 if successful, or the DOS error code if not.
             errno: EACCES, EBADF
 
  See also:  _dos_write, _read, fread
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