Base Operating System and Extensions Technical Reference, Volume 2 towupper Subroutine Purpose Converts a lowercase wide character to an uppercase wide character. The towupper subroutine converts the lowercase wide character specified by the WC parameter into the corresponding uppercase wide character.
Parameters WC Specifies the wide character to convert to uppercase.
If the WC parameter contains a lowercase wide character that has a corresponding uppercase wide character, that wide character is returned. Otherwise, the WC parameter is returned unchanged. The iswalnum subroutine, iswalpha subroutine, iswcntrl subroutine, iswctype subroutine, iswdigit subroutine, iswgraph subroutine, iswlower subroutine, iswprint subroutine, iswpunct subroutine, iswspace subroutine, iswupper subroutine, iswxdigit subroutine, setlocale subroutine, towlower subroutine, wctype subroutine.