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

  Searches a wide-character string for the first occurrence of one of
  a specified set of wide characters.

  Syntax:

       #include <wchar.h>

       wchar_t *wcspbrk const wchar_t *wstr, const wchar_t *charset);