为什么设置Splitter的位置会如此困难？

Question

下面给出的代码内容；需要3个面板和2个拆分器。但是，第二个拆分器(绿色)必须位于灰色和棕色面板之间。但不是在正确的地方。有什么建议吗？谢谢。

Public Class Form1
    Private Sub Form1_Load(sender As Object, e As EventArgs) Handles MyBase.Load
        Me.Show()

        Dim tmpSplitter As Splitter
        Dim tmpPanel As Panel
        Dim MainPanel As Panel

        ' This is main panel
        '
        MainPanel = New Panel
        With MainPanel
            .Name = "MainPanel"
            .Dock = DockStyle.Fill
            .BackColor = Color.LightGray
            .BorderStyle = BorderStyle.Fixed3D
            .Visible = True
        End With
        Me.Controls.Add(MainPanel)

        ' 1: First Top Panel and Splitter 
        '
        tmpPanel = New Panel
        With tmpPanel
            .Name = "Panel1"
            .Dock = DockStyle.Top
            .BackColor = Color.Red
            .Visible = True
        End With

        tmpSplitter = New Splitter
        With tmpSplitter
            .Name = "Split1"
            .Dock = DockStyle.Top
            .BackColor = Color.Blue
            .Cursor = Cursors.HSplit
        End With

        Me.Controls.Add(tmpSplitter)
        Me.Controls.Add(tmpPanel)


        ' 2: Second Panel added to the left side of the main panel
        '
        MainPanel.Dock = DockStyle.Right
        MainPanel.Size = New Size(MainPanel.Width * 0.5, MainPanel.Height)

        Dim btn As New Button
        btn.Size = New Size(10, 50)
        btn.Location = New Point(MainPanel.Location.X - btn.Width, MainPanel.Location.Y)
        Me.Controls.Add(btn)


        tmpPanel = New Panel
        With tmpPanel
            .Size = New Size(10, MainPanel.Height)
            .Location = New Point(MainPanel.Location.X - .Width - 5, MainPanel.Location.Y)
            .Name = "Panel2"
            .Dock = DockStyle.Fill
            .BackColor = Color.Brown
        End With

        ' THIS SPLITTER IS NOT IN THE RIGHT PLACE. Must be between brown and gray panel
        '
        tmpSplitter = New Splitter
        With tmpSplitter
            .Size = New Size(5, MainPanel.Height)
            .Location = New Point(MainPanel.Location.X - .Width, MainPanel.Location.Y)
            .Name = "Split2"
            .Dock = DockStyle.Right
            .BackColor = Color.Green
            .Cursor = Cursors.VSplit
        End With

        Me.Controls.Add(tmpSplitter)
        Me.Controls.Add(tmpPanel)

    End Sub
End Class

Answer 1

多做一点研究，试着解决这个问题

Me.Controls.SetChildIndex (tmpSplitter, 0)

足够写在最后一行了。感谢您的贡献。