func Init()
  var(obj_id)
  fvar(old,classpath)
  old = block.select(BLK_CLASS)
  if (sys.gvarfind('md5_class') = -1)
   gvar(md5_class)
   classpath=replace(sys.codedir() & 'classes\MD5.vbs','\\','\\\\')
   println(code(file2str(classpath)))
  end
  obj_id = hash_
  block.select(BLK_GLOB)
  println('Dim ',obj_id)
  block.select(BLK_OBJ)
  println('Set ',obj_id,' = New MD5')
  block.select(old)
end

func doHashsum(_data)
  if(linked(onResult))
   event(onResult, obj_id && '.MD5(' && Data && ')')
  end
end