If Not TreeView1.SelectedNode Is Nothing Then
            Select Case TreeView1.SelectedNode.Name
                Case "Kamera"
                    Using Kamera
                        Allgemein.Hide()
                        Me.Hide()
                        Kamera.ShowDialog()
                    End Using
                Case "Allgemein"
                    Using Allgemein
                        Kamera.Hide()
                        Me.Hide()
                        Allgemein.ShowDialog()
                    End Using
        End If