Go4Expert - 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