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

  Locates the first occurrence in the string pointed to by wstr1 of
  the sequence of wide characters in the string pointed to by wstr2.

  Syntax:

       #include <wchar.h>

       wchar_t *wcswcs (const wchar_t *wstr1, const wchar_t *wstr2);