Question

I have a class library written in .Net that I would like to make available to VB6/VBA. What I tried did not work (obviously as I am asking this question). Here is what I did:

1. I Created a Class Library Project in Visual Studio 2010 Express and put the code in a Class Module.
2. I opened the project properties and went to “Assembly Information” and checked “Make COM Visible”.
3. I went to “Advanced Compile” options and targeted .Net 2.0 (it’s very simple code).
4. I then removed all references expect for “System”.
5. I built the project (no warnings or errors) and copied the DLL out of the Bin folder into C:\Windows\System32\
6. I ran RegSvr32 to register the DLL and got the error:

The module “MyDll.dll” was loaded but the entry-point DLLRegisterServer was not found.

Make sure that “MyDll.dll is a valid DLL or OCX file and then try again.

Clearly my first attempt was a bit naive. Could someone offer guidance?

Answer 1

Step #6 is wrong. .NET assemblies with [ComVisible] types are registered with Regasm.exe. Use the /codebase command line option if you don’t want to install the DLL into the GAC. The /tlb command line option creates the type library, you can use that in your VB6 project.