武汇川太极拳:在VB中如何动态改变控件大小

程序中代码如下，但是不能运行。一运行就什么控件都看不到了，不知道为什么？哪位可以帮帮在下，不胜感激！

这里面有两个潜在的问题：
Public Sub ResizeInit(FormName As Form)
Dim Obj As Control
FormOldWidth = FormName.ScaleWidth
FormOldHeight = FormName.ScaleHeight
On Error Resume Next
For Each Obj In FormName
Obj.Tag = Obj.Left & " " & Obj.Top & " " & Obj.Width & " " & Obj.Height & " "
Next Obj
On Error GoTo 0
End Sub
潜在的问题一，如果把 On Error Resume Next 拿掉，当执行到下面这行的时候，
Obj.Tag = Obj.Left & " " & Obj.Top & " " & Obj.Width & " " & Obj.Height & " "
系统会提示Left属性在运行时不可读。

For Each Obj In FormName
StartPos = 1
For I = 0 To 4
'读取控件的原始位置与大小

TempPos = InStr(StartPos, Obj.Tag, " ", vbTextCompare)
If TempPos > 0 Then
Pos(I) = Mid(Obj.Tag, StartPos, TempPos - StartPos)
StartPos = TempPos + 1
Else
Pos(I) = 0
End If
'根据控件的原始位置及窗体改变大小的比例对控件重新定位与改变大小
Obj.Move Pos(0) * ScaleX, Pos(1) * ScaleY, Pos(2) * ScaleX, Pos(3) * ScaleY
Next I
Next Obj

潜在问题二，如果把 On Error Resume Next 拿掉，当执行到下面这行的时候，Obj.Move Pos(0) * ScaleX, Pos(1) * ScaleY, Pos(2) * ScaleX, Pos(3) * ScaleY
会出现“对象不支持该属性或方法”的错误。

详细代码如下：
Private Sub Form_Load()
Call ResizeInit(Me)
End Sub

Private Sub Form_Resize()
Call ResizeForm(Me)
End Sub

'在调用ResizeForm前先调用本函数
Public Sub ResizeInit(FormName As Form)
Dim Obj As Control
FormOldWidth = FormName.ScaleWidth
FormOldHeight = FormName.ScaleHeight
On Error Resume Next
For Each Obj In FormName
Obj.Tag = Obj.Left & " " & Obj.Top & " " & Obj.Width & " " & Obj.Height & " "
Next Obj
On Error GoTo 0
End Sub

'按比例改变表单内各元件的大小，在调用ReSizeForm前先调用ReSizeInit函数
Public Sub ResizeForm(FormName As Form)
Dim Pos(4) As Double
Dim I As Long, TempPos As Long, StartPos As Long
Dim Obj As Control
Dim ScaleX As Double, ScaleY As Double

ScaleX = FormName.ScaleWidth / FormOldWidth / 1.25
'保存窗体宽度缩放比例
ScaleY = FormName.ScaleHeight / FormOldHeight / 1.55

'保存窗体高度缩放比例
On Error Resume Next
For Each Obj In FormName
StartPos = 1
For I = 0 To 4
'读取控件的原始位置与大小

TempPos = InStr(StartPos, Obj.Tag, " ", vbTextCompare)
If TempPos > 0 Then
Pos(I) = Mid(Obj.Tag, StartPos, TempPos - StartPos)
StartPos = TempPos + 1
Else
Pos(I) = 0
End If
'根据控件的原始位置及窗体改变大小的比例对控件重新定位与改变大小
Obj.Move Pos(0) * ScaleX, Pos(1) * ScaleY, Pos(2) * ScaleX, Pos(3) * ScaleY
Next I
Next Obj
On Error GoTo 0
End Sub