How do I access a DLL in Excel VBA?

[Ryu Soma]

I'm trying to access the functions/Methods of a dll in VBA.
The dll was created as COM Add-In with C#.NET and is registered in the Excel Application (I can't register it in the VBA Add-In Manager).

When I try to access the dll in VBA with

Public Declare Sub Test2 Lib...

I only get an error telling me the file wasn't found, even though I used the full path of the dll.

What did I do wrong?
And what is the correct way of using a function or method from a dll?

Thanks.

[Ryu Soma]

My bad, the error wasn't file not found but entry point not found.
I used the exact same names as the methods I created in the dll, though.