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

  Returns a nonzero integer if its wide-character argument has a
  specified property.  Otherwise, it returns 0.  The specified
  property (wc_prop) is set by calling the wctype routine.

  Syntax:

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

       int iswctype (wint_t wc, wctype_t wc_prop);