Public Const MSGBOX_TITLE As String = "MyMessageBox"
    Private Sub Button6_Click(ByVal sender As System.Object, ByVal e As _
      System.EventArgs) Handles Button6.Click
        '// MsgBox aufrufen und einen Timer starten
        Me.Timer1.Enabled = True
        MessageBox.Show(MSGBOX_TITLE, MSGBOX_TITLE)
    End Sub
 
    '// Die benötigten Win32-API's
    Private Declare Function FindWindow Lib "user32" Alias _
                                                    "FindWindowA" ( _
                                                    ByVal lpClassName As _
                                                    String, _
                                                    ByVal lpWindowName As _
                                                    String) As Integer
    Private Declare Function SetForegroundWindow Lib "user32" ( _
                                                    ByVal hWnd As Integer) As _
                                                    Integer
 
    Private Sub Timer1_Tick(ByVal sender As System.Object, ByVal e As _
      System.EventArgs) Handles Timer1.Tick
        Dim h As Integer = FindWindow("#32770", MSGBOX_TITLE)
        Debug.WriteLine(h)
        '// MsgBox in Vordergrund bringen und Timer stoppen
        SetForegroundWindow(h)
        Me.Timer1.Enabled = False
    End Sub