External application window position

Hello, I'm working on some project and I need your help guys. I'm just a beginner. I searched the forums for a related topic but couldn't found any resolved answer. So how can I fire my external application "DXSETUP.exe" at center screen position using this code? Thanks.

Code:

Private Sub Panel3_MouseClick(ByVal sender As System.Object, ByVal e As System.Windows.Forms.MouseEventArgs) Handles Panel3.MouseClick
    Try
      Me.Hide()
      Threading.Thread.Sleep(2000)
      With dx.StartInfo
        .UseShellExecute = True
        .FileName = Application.StartupPath & "\redist\directx_Jun2010_redist\DXSETUP.exe"
      End With
      dx.Start()
      dx.WaitForExit()
      dx.Close()
      Threading.Thread.Sleep(2000)
      Try
        Shell(Application.StartupPath & "\Setup.exe", vbNormalFocus)
      Catch ex As Exception
        gui_error1.ShowDialog()
      End Try
      Application.Exit()
    Catch ex As Exception
      gui_error2.ShowDialog()
    End Try
  End Sub