"RETURN VALUE"
The wcsstr function returns a pointer to the first occurrence of needle in haystack. It returns NULL if needle does not occur as a substring in haystack. Note the special case: If needle is the empty wide-character string, the return value is always haystack itself.
"CONFORMING TO"
ISO/ANSI C, UNIX98
"SEE ALSO"
strstr(3), wcschr(3)
