VMS Help  —  CRTL  iswupper
    Indicates if a wide character is classed as an uppercase
    character in the program's current locale.

    Format

      #include  <wctype.h> (ISO C)

      #include  <wchar.h> (XPG4)

      int iswupper  (wint_t wc);
Additional Information: explode extract
Argument Return Values
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