Public Interface PlugIn
 
    Function Show() As Windows.Forms.Panel
    Function Close() As Boolean
    'Function Load() As Boolean ' mometan nicht gebraucht
 
End Interface

Public Class PlugInClass
    Implements PluginEngine.PlugIn
 
    Private frm As New frmMain
 
    Public Function Close() As Boolean Implements PluginEngine.PlugIn.Close
        Try
            frm.Close()
            frm.Dispose()
            frm = Nothing
            Return True
        Catch ex As Exception
            Return False
        End Try
    End Function
 
 
    Public Function Show() As Windows.Forms.Panel Implements _
      PluginEngine.PlugIn.Show
        Try
            frm = New frmMain
            Return frm.Content
        Catch ex As Exception
            Return frm.Content
        End Try
    End Function
 
End Class

 Dim cPanel As New Panel
        cPanel = PlugIn.Show()
 
        Me.PluginContent = cPanel