Form改變大小時同時改變其內Control之大小

這個程式只是個范例，但在某些物件上不能使用，例如:Line，因為它沒有Top, Left
Width, Height所以在本程式中沒有作用，不過呢，像這一類的東西可自己用另外程式
去控制。


Option Explicit
Private InitWidth As Long       ' Form 的原始大小
Private InitHeight As Long

Private Sub Form_Load()
InitWidth = ScaleWidth
InitHeight = ScaleHeight
Dim Ctl As Control
' 記錄每個 Control 的原始位置、大小、字型大小, 放在 Tag 屬性中
On Error Resume Next '確保left, top, width, height, Tag屬性沒有全有的Control
For Each Ctl In Me   '也能正常執行
    Ctl.Tag = Ctl.Left & " " & Ctl.Top & " " & Ctl.Width & " " & Ctl.Height & " "
    Ctl.Tag = Ctl.Tag & Ctl.FontSize & " "
Next Ctl
On Error GoTo 0
End Sub

Private Sub Form_Resize()
Dim D(4) As Double
Dim I As Long
Dim TempPos As Long
Dim StartPos As Long
Dim Ctl As Control
Dim TempVisible As Boolean
Dim ScaleX As Double
Dim ScaleY As Double

ScaleX = ScaleWidth / InitWidth
ScaleY = ScaleHeight / InitHeight
On Error Resume Next
For Each Ctl In Me
    TempVisible = Ctl.Visible
    Ctl.Visible = False
    StartPos = 1
    ' 讀取 Control 的原始位置、大小、字型大小
    For I = 0 To 4
        TempPos = InStr(StartPos, Ctl.Tag, " ", vbTextCompare)
        If TempPos > 0 Then
            D(I) = Mid(Ctl.Tag, StartPos, TempPos - StartPos)
            StartPos = TempPos + 1
        Else
            D(I) = 0
        End If
        ' 根據比例設定 Control 的位置、大小、字型大小
        Ctl.Move D(0) * ScaleX, D(1) * ScaleY, D(2) * ScaleX, D(3) * ScaleY
        'Ctl.Width = D(2) * ScaleX
        'Ctl.Height = D(3) * ScaleY
        If ScaleX < ScaleY Then
            Ctl.FontSize = D(4) * ScaleX
        Else
            Ctl.FontSize = D(4) * ScaleY
        End If
    Next I
    Ctl.Visible = TempVisible
Next Ctl
On Error GoTo 0
End Sub