/sys$common/syshlp/helplib.hlb CC, Run-time functions, fputwc  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  Converts a wide character to its corresponding multibyte value,
  returns the result, and writes the result to the specified file.

  Syntax:

       #include <wchar.h>

       wint_t fputwc (wint_t wc, FILE *file_ptr);