Concatenates a counted number of wide-characters from one string
    to another.

    Format

      #include  <wchar.h>

      wchar_t *wcsncat  (wchar_t *wstr_1, const wchar_t *wstr_2,
                        size_t maxchar);

  Additional Information (explode) :

• Function Variants
• Arguments
• Description
• Return Value
• Example