Public Structure activeWindow
        Public handle As IntPtr         'handle des fensters
        Public title As String          'titel des fenster
        Public processName As String    'prozess name
    End Structure
    Private activeWindows As List(Of activeWindow) 
 
''' <summary>Gibt alle geöffneten Fenster zurück.</summary>
    Public ReadOnly Property OpenWindows() As List(Of activeWindow)
        Get
            Return activeWindows
        End Get
    End Property