Размещение внешнего процесса внутри панели в VB 2010

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Я так и не смог понять, почему внешний процесс не отображается внутри панели. У меня есть следующие объявления в классе form1:

Dim myProcess As Process = New Process()
    Public WithEvents thb As Button = New System.Windows.Forms.Button
    Public Declare Function SetParent Lib "user32" Alias "SetParent" (ByVal hWndChild As IntPtr, ByVal hWndNewParent As IntPtr) As System.IntPtr

Затем для загрузки формы 1:

Private Sub Form1_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        WindowState = FormWindowState.Maximized
        MaximizeBox = False
        ShowIcon = False
        Text = "TLT Opener"
        thb.Location = New System.Drawing.Point(20, 20)
        thb.Name = "thb"
        thb.Size = New System.Drawing.Size(200, 23)
        thb.TabIndex = 1
        thb.Text = "Open TLT"
        thb.UseVisualStyleBackColor = True
        Controls.Add(Me.thb)
        IsMdiContainer = True
        myProcess.StartInfo.WindowStyle = ProcessWindowStyle.Normal
        myProcess.StartInfo.FileName = "C:\Program Files (x86)\Transformation LogicTree\TLT.exe"

    End Sub

Это прекрасно работает, и форма 1 появляется с помощью кнопки "Открыть TLT" и при нажатии на нее...

Private Sub Button2_Click(ByVal sender As System.Object, ByVal e As System.EventArgs) Handles thb.Click
        Dim listProc() As System.Diagnostics.Process
        listProc = System.Diagnostics.Process.GetProcessesByName("TLT")
        If listProc.Length > 0 Then
            SetParent(myProcess.MainWindowHandle, Me.Panel1.Handle)
            Exit Sub
        End If
        myProcess.Start()
        myProcess.EnableRaisingEvents = True            
        AddHandler myProcess.Exited, AddressOf ProcessExited    
        myProcess.WaitForInputIdle()
        SetParent(myProcess.MainWindowHandle, Me.Panel1.Handle)
        
        Me.BringToFront()  'don't know is needed
    End Sub

Вызывается внешний процесс, и он отображается правильно, но не внутри панели1.

Что я уже пробовал:

Tried all suggested available hints from other threads... but the only way I am able to get the external app inside the panel1 is if I click the "Open TLT" button once the external app is running. Tried to force a click to the button but programmatically it does nothing, only if done with a mouse click.

Does someone knows why is this and how to resolve it?

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