VB listview一問在線等待

Private Sub ListView1_ColumnClick(ByVal ColumnHeader As MSComctlLib.ColumnHeader)
    With ListView1
        .SortOrder = IIf(.SortOrder, 0, 1)
        .SortKey = ColumnHeader.SubItemIndex
        .Sorted = True
    End With
End Sub以上是一個排序的程序, 我想問一問每一行每一句是什麼意思?
謝謝...