Static Formular as Form
' Alle Fenster neu zeichnen
    For Each Formular In Forms
        Call SendMessage(Formular.hwnd, WM_PAINT, Formular.hDc, 0&)
    Next Formular

        Dim Fenster As Form
 
        For Each Fenster In System.Windows.Forms
            ' neu zeichnen
            Fenster.Invalidate()
        Next