关于vb中的变量

    For iLoop = 1 To iAddCount   'iAddcount条目的最大数
        Me.ComboStart.AddItem (sAddList(iLoop))       '???????????????
        Me.ComboEnd.AddItem (sAddList(iLoop))        '???????????????
    next
Me.ComboStart.AddItem (sAddList(iLoop))
  Me.ComboEnd.AddItem (sAddList(iLoop))
这两句括号里的内容是什么用法，请大侠指教~~~谢谢~~~