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

  Used to define a property.  The value returned by this function is
  used in calls to the iswctype function.

  Syntax:

       #include <wctype.h>  (ISO C Standard)
       #include <wchar.h>   (XPG4 Standard)

       wctype_t wctype (const char *property);