C Language and Libraries Help (clang.hlp) (Table of Contents; Topic list)
wctomb, _fwctomb
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─────Run-Time Library───────────────────────────────────────────────────────
 
  Include:   <stdlib.h>
 
  Syntax:    int wctomb( char *mbchar, wchar_t wchar );
             int _fwctomb( char __far *mbchar, wchar_t wchar );
 
  Returns:   the number of bytes in the wide character if successful;
             0 if <wchar> is NULL; -1 if the conversion is not possible in
             the current locale.
 
  See also:  mblen, mbstowcs, mbtowc, wchar_t, wcstombs, MB_CUR_MAX,
             MB_LEN_MAX
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