Unable to register .net COM DLL

Question

I have registered a .net COM dll using the regasm tool and the registration was successful. It says 'Type registered successfully'. But when I open registry I cannot see my dll there. I searched using both ProgId & clsId but not there.

I registered another dll too in same way and it got registered successfully and I am able to access it from a VB6 dll.

What problem could it be. Something wrong with the dll? I set the project properties for both my dlls in same way and one seems to got registered successfully.

I am supposed to test the dll accessing from an existing vb6 tool and unable to start it.

Thanks

Nishitha

Answer 1

Use regasm.exe with the /regfile option. This will create a reg file containing all entries that are going to be created when registering an assembly.

If the file does not contain any entries, your assembly does not export any COM types. Then you need to make sure that you either flag the Make assembly COM visible option in the project properties or use the [ComVisible(true)] attribute on the respective types.

If you are on a 64-bit system, make sure you are using the correct version of regasm as there are separate versions for 32-bit and 64-bit:

• %SYSTEMROOT%Microsoft.NETFramework<framework version> egasm.exe
• %SYSTEMROOT%Microsoft.NETFramework64<framework version> egasm.exe