Library /sys$common/syshlp/helplib.hlb  —  CRTL  vsnprintf
    Prints formatted output based on an argument list.

    This function is OpenVMS Alpha and Integrity servers only.

    Format

      #include  <stdio.h>

      int vsnprintf  (char *str, size_t n, const char *format,
                     va_list ap);
Additional Information: explode extract
Arguments Description Return Values
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