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_harderr, _hardresume, _hardretn
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─────Run-Time Library───────────────────────────────────────────────────────
 
  Include:   <dos.h>
 
  Syntax:    void _harderr( void (__far *handler)() );
             void _hardresume( int result );
             result: _HARDERR_ABORT, _HARDERR_FAIL, _HARDERR_IGNORE,
                     _HARDERR_RETRY
 
             void _hardretn( int error );
 
  See also:  perror, errno
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