动态添加基于工作表名称的新表单控件复选框（Excel VBA）

Question

如果有任何新工作表添加到工作簿，我正在尝试创建一个添加复选框（单击按钮）的系统。我的代码在下面，它能够创建复选框，直到我尝试更改位置，所以我假设它不起作用的原因是由于这一点。

Private Sub Update_Click()
Dim cb As CheckBox
Dim Exists As Boolean
'I think these location/ dimension variables are perhaps wrong (I'm not sure what values they take)
Dim TopLocation As Double
Dim LeftLocation As Double
Dim Width As Double
Dim Height As Double

    For Each ws In ActiveWorkbook.Worksheets
'This loop is simply to stop it from making duplicate checkboxes
Exists=False
        For Each cb In ThisWorkbook.Worksheets("Summary").CheckBoxes
            If cb.name = ws.name Or ws.name = "Summary" Or ws.name = "Price List (2)" Then
                Exists = True

            End If

        Next

        If Exists = False Then

        TopLocation = 0
    LeftLocation = 0
    Width = 0
    Height = 0
'The following loop is an attempt to find the checkbox that is furthest down the page, the problem is that I am not too familiar with the location attribute so am just assuming that it increases as you move down the page
    For Each cb In ThisWorkbook.Worksheets("Summary").CheckBoxes
        If cb.Top > TopLocation Then
            TopLocation = cb.Top
        End If
         If cb.Left > LeftLocation Then
            LeftLocation = cb.Left
        End If
         If cb.Width > Width Then
            Width = cb.Width
        End If
         If cb.Height > Height Then
            Height = cb.Height
        End If

    Next
'The following is where I believe the problem to be, I thought that I could simply use the variables I had created to place the new one in this location
            With ThisWorkbook.Worksheets("Summary").CheckBoxes.Add(LeftLocation, TopLocation + Height, Width, Height)
                .name = ws.name
                .Caption = ws.name
            End With

        End If
    Next ws
End Sub

我想也许这是对复选框语法的误解，并希望有人能帮助我理解我哪里出错了。任何帮助表示赞赏，谢谢:)