Library /sys$common/syshlp/helplib.hlb  —  CRTL  vfwscanf  Return Values
    n                  The number of successfully matched and
                       assigned wide-character input items.
    EOF                Indicates that a read error occurred before
                       any conversion. The function sets errno. For a
                       list of the values set by this function, see
                       vfscanf.
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