How do I properly register the Type Library of A VB.NET COM+ Component?

Posted by k_Dank on Stack Overflow See other posts from Stack Overflow or by k_Dank
Published on 2012-06-05T19:30:49Z Indexed on 2012/06/07 4:40 UTC
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I am looking to upgrade legacy VB6 COM+ components to VB.NET components. I have seemingly upgraded one already, called EventPackage, which has one class, IEventListener. Another, TradeOrders, Implements EventPackage.IEventListener. When attempting to build TradeOrders, I get the following Errors/Warnings;

  1. Cannot load type library for reference "EventPackage". Library not registered. (Exception from HRESULT: 0x8002801D (TYPE_E_LIBNOTREGISTERED))
  2. The referenced component 'EventPackage' could not be found.
  3. Type 'EventPackage.IEventListener' is not defined.

In the .vbproj, I notice this reference

<COMReference Include="EventPackage">
  <Guid>{0D76C094-21A6-4E04-802B-6E539F7102D7}</Guid>
  <Lcid>0</Lcid>
  <VersionMajor>2</VersionMajor>
  <VersionMinor>0</VersionMinor>
  <WrapperTool>tlbimp</WrapperTool>
</COMReference>

When I search the registry for this Guid, I find nothing. When using GUIDs for similar COM+ objects, I find them in HKEY_CLASSES_ROOT\CLSID\{...}\TypeLib ("..." being the GUID of the other component). When I go to the registry key name corresponding to EventPackage.IEventListener, I find that there is no \TypeLib subkey. As you might suspect, searching the reg for "0D76C094-21A6-4E04-802B-6E539F7102D7" yields no results.

So I know this must be a registry problem, But I have tried seemingly every google result I have found. I have tried Regasm and regsvcs .exe's to no avail. Many pages just tell me that dragging the dll to the COM+ manager should automatically register the component.

So how do I register the Type library?

Details on how I made EventPackage COM+ component

  1. Ran the VB6->VB.NET wizard

Then I added some lines to the assemblyinfo.vb file

  1. added Imports System.EnterpriseServices
  2. added Imports System.EnterpriseServices
  3. Imports System.Data.SqlClient
  4. <Assembly: CLSCompliant(True)>
  5. <Assembly: AssemblyKeyFileAttribute("...")> for a strong name
  6. <Assembly: Guid("...")> (Where "..." is the COM+ CLSID of the old component)

I added the following to the class file IEventListener.VB

  1. Imports System.EnterpriseServices
  2. <ComClass("...")> _ (Where ... is the proper COM+ CLSID, that is the only argument)
  3. Inherits ServicedComponent
  4. changed the ID made by the Conversion wizard to the proper value (from <System.Runtime.InteropServices.ProgId("IEventListener_NET.IEventListener)> to <System.Runtime.InteropServices.ProgId("EventPackage.IEventListener")> _

Then I dragged the DLL into the COM+ manager in the proper COM+ application (although, the "Path" is not specified and only says mscoree.dll)

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