I created a few plugins in vb6 (activex dll) for an OCR application. Now I am
trying to re-write one simple plugin in vb.net 2005.

In vb6 I created a new ActiveX DLL, added a reference to a dll from the OCR
application, added some, and entered some config info into the ini file of
the OCR application. The code in vb6 is:
Option Explicit

'Ini file
Private m_IniFile As String
Private m_IniSection As String

Private m_SourceImagePath As String
Private m_DebugLogfile As String

'Eyes & Hands Forms objects
Private objTransfer As EHF.TransferApp

Public Function Connect(ByRef ehApp As Object, ByRef strInifile As String,
ByRef strIniSection As String) As Long

   'Setup global App object
   Set objTransfer = ehApp

   'Subscribe to events
   Call objTransfer.Subscribe(Me, "InvoiceTransfer", "OnInvoiceTransfer")
   
   'Remember ini settings
   m_IniFile = strInifile
   m_IniSection = strIniSection
   m_DebugLogfile = GetSetting(m_IniSection, "DebugLogfile", m_IniFile)
   
   Connect = EV_OK
End Function

Public Function Disconnect(ehApp As Object) As Long

   'Release object
   Set objTransfer = Nothing
   
   Disconnect = EV_OK
End Function

Public Function OnInvoiceTransfer() As Long

   MsgBox "KLAAAR: " & objTransfer.Info
   
   
End Function

Now I am trying to create in vb.net 2005. I created a new project as a class
library, added a reference to the OCR application DLL (from the COM tab in
the add reference dialog) and added a new com class and added the following
code:
Imports System.Runtime.InteropServices

<ComClass(Transfer2.ClassId, Transfer2.InterfaceId, Transfer2.EventsId)> _
Public Class Transfer2

#Region "COM GUIDs"
   ' These  GUIDs provide the COM identity for this class
   ' and its COM interfaces. If you change them, existing
   ' clients will no longer be able to access the class.
   Public Const ClassId As String = "0541f21e-ea70-47a5-af14-26ae14567c04"
   Public Const InterfaceId As String =
"d33b492b-71ef-45fb-8d83-c84d24a9be37"
   Public Const EventsId As String = "d6bf8cbd-57ac-415e-88ef-6137d1d97ce4"
#End Region

   ' A creatable COM class must have a Public Sub New()
   ' with no parameters, otherwise, the class will not be
   ' registered in the COM registry and cannot be created
   ' via CreateObject.
   Public Sub New()
       MyBase.New()
   End Sub

   'Ini file
   Private m_IniFile As String
   Private m_IniSection As String

   Private m_SourceImagePath As String
   Private m_DebugLogfile As String

   'Eyes & Hands Forms objects
   Private objTransfer As EHF.TransferApp

   Public Function Connect(ByRef ehApp As Object, ByRef strInifile As
String, ByRef strIniSection As String) As Long
       EventLog.WriteEntry("Connect", "Connected")
       'Setup global App object
       objTransfer = ehApp

       'Subscribe to events
       Call objTransfer.Subscribe(Me, "InvoiceTransfer", "OnInvoiceTransfer")

       'Remember ini settings
       m_IniFile = strInifile
       m_IniSection = strIniSection
       m_DebugLogfile = GetSetting(m_IniSection, "DebugLogfile", m_IniFile)

       Connect = EV_OK
   End Function

   Public Function Disconnect(ByVal ehApp As Object) As Long

       'Release object
       objTransfer = Nothing

       Disconnect = EV_OK
   End Function

   Public Function OnInvoiceTransfer() As Long

       MsgBox("KLAAAR: " & objTransfer.Info)

   End Function

End Class

I compile this. I get two DLL's. One from my code and one interop from the
reference I added. I copy both to the machine running the OCR and register
them both using regasm.exe.

But the OCR application does not see the plugin. When I use filemon.exe I
can see that it is loaded, but the OCR application gives and error that it
cannot load the plugin.

Any help?