Compares two wide-character strings and returns an integer
    that indicates if the strings differ, and how they differ.
    The function uses the collating information in the LC_COLLATE
    category of the current locale to determine how the comparison is
    performed.

    Format

      #include  <wchar.h>

      int wcscoll  (const wchar_t *ws1, const wchar_t *ws2);

1 - Arguments

 ws1, ws2

    Pointers to wide-character strings.

2 - Description

    The wcscoll function, unlike wcscmp, compares two strings in a
    locale-dependent manner. Because no value is reserved for error
    indication, the application must check for one by setting errno
    to 0 before the function call and testing it after the call.

    See also wcsxfrm.

3 - Return Values

    < 0                Indicates that ws1 is less than ws2.
    0                  Indicates that the strings are equal.
    > 0                Indicates that ws1 is greater than ws2.