如何根据Excel中指定单元格的值自动更改形状大小？

Private Sub Worksheet_Change(ByVal Target As Range)
    On Error Resume Next
    If Target.Row = 2 And Target.Column = 1 Then
        Call SizeCircle("Oval 2", Val(Target.Value))
    End If
End Sub
Sub SizeCircle(Name As String, Diameter)
    Dim xCenterX As Single
    Dim xCenterY As Single
    Dim xCircle As Shape
    Dim xDiameter As Single
    On Error GoTo ExitSub
    xDiameter = Diameter
    If xDiameter > 10 Then xDiameter = 10
    If xDiameter < 1 Then xDiameter = 1
    Set xCircle = ActiveSheet.Shapes(Name)
    With xCircle
        xCenterX = .Left + (.Width / 2)
        xCenterY = .Top + (.Height / 2)
        .Width = Application.CentimetersToPoints(xDiameter)
        .Height = Application.CentimetersToPoints(xDiameter)
        .Left = xCenterX - (.Width / 2)
        .Top = xCenterY - (.Height / 2)
    End With
ExitSub:
End Sub

Private Sub Worksheet_Change(ByVal Target As Range)
    Dim xAddress As String
    On Error Resume Next
    If Target.CountLarge = 1 Then
        xAddress = Target.Address(0, 0)
        If xAddress = "A1" Then
            Call SizeCircle("Oval 1", Val(Target.Value))
        ElseIf xAddress = "A2" Then
            Call SizeCircle("Smiley Face 3", Val(Target.Value))
        ElseIf xAddress = "A3" Then
            Call SizeCircle("Heart 2", Val(Target.Value))
        End If
    End If
End Sub

Sub SizeCircle(Name As String, Diameter)
    Dim xCenterX As Single
    Dim xCenterY As Single
    Dim xCircle As Shape
    Dim xDiameter As Single
    On Error GoTo ExitSub
    xDiameter = Diameter
    If xDiameter > 10 Then xDiameter = 10
    If xDiameter < 1 Then xDiameter = 1
    Set xCircle = ActiveSheet.Shapes(Name)
    With xCircle
        xCenterX = .Left + (.Width / 2)
        xCenterY = .Top + (.Height / 2)
        .Width = Application.CentimetersToPoints(xDiameter)
        .Height = Application.CentimetersToPoints(xDiameter)
        .Left = xCenterX - (.Width / 2)
        .Top = xCenterY - (.Height / 2)
    End With
ExitSub:
End Sub