Imports System.Reflection
Imports System.Windows.Forms
 
Public Class Form1
 
    ' Die externe Assembly zunächst (hier per Dateipfad) laden:
    Dim externeAssembly As [Assembly] _
                        = [Assembly].LoadFrom("C:\ClassLibrary1.dll")
 
    ' Modul abholen:
    Dim assemblyModul As [Module] _
                      = externeAssembly.GetModule("ClassLibrary1.dll")
 
    ' Den Typ "Form1" des Moduls abholen (inkl. Namespace-Angabe!):
    Dim typeForm1 As Type = assemblyModul.GetType("ClassLibrary1.Form1")
 
    ' Instanz der Form erzeugen und anzeigen:
    Dim externeForm As Form = DirectCast(Activator.CreateInstance(typeForm1), _
      Form)
 
 
 
 
 
    Private Sub Button1_Click(ByVal sender As System.Object, ByVal e As _
      System.EventArgs) Handles Button1.Click
        externeForm.Show() <--HIER WIRD BEI FEHLER MAKIERT
    End Sub
End Class