func doString
  fvar(s,i)
  s = 'sprintf(' && Mask && ','
  for(i = 1; i <= _data_count_; i++) 
    s &&= (i > 1) ? ',' : '' && point("Str" + i)
  end
  s &&= ')'
  if(linked(Result))
    println(res, ' = ', s, ';')
    event(onFString, res)
  else
    event(onFString, s)
  end
end

func Result
  return(res)
end