cpp/string/wide/wcscat

Appends a copy of the wide string pointed to by to the end of the wide string pointed to by. The wide character replaces the null terminator at the end of. The resulting wide string is null-terminated.

The behavior is undefined if the destination array is not large enough for the contents of both and  and the terminating null wide character.

The behavior is undefined if the strings overlap.

Return value
Returns a copy of.