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

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

  Syntax:

       #include <wchar.h>

       wint_t putwc(wint_t wc FILE *file_pointer);