Library /sys$common/syshlp/helplib.hlb  —  CRTL  vwprintf
    Writes output to an array of wide characters under control of the
    wide-character format string.

    Format

      #include  <wchar.h>

      int vwprintf  (const wchar_t *format, va_list ap);
Additional Information: explode extract
Arguments Description Return Values
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