VMS Help CC, Run-time functions, fputws  *Conan The Librarian (sorry for the slow response - running on an old VAX)

  Converts a wide-character string to a to a multibyte character
  string and writes it to the specified file.

  The function does not append a terminating null byte, corresponding
  to the null wide-character, to the output string.

  Syntax:

       #include <wchar.h>

       int fputws (const wchar_t *wstr, FILE *file_ptr);