>The DLL does not show in the list and I think I know why. After hours of google searches I found a number of references to visibility of .NET components to non-.NET languages.
>
>These refer to the use of REGTLIBv12.exe and REGASM.EXE .
>
>I have .NET 4.5.1 installed and both programs are in the folder C:\Windows\Microsoft.NET\Framework\v4.0.30319\.
>
>Can you confirm that I need to run these on the .TLB and .DLL files and whether the order of running is significant?
>
>Thanks for your assistance

You should only need to run Regasm against the DLL:

Regasm Some.dll /codebase.

(This is assuming the DLL was built using the 'Register for COM interop' switch )