>I have a class that I compile into a DLL. From inside the class, I want a method that will return the verion number of the DLL that was set at build time. Getting the version number is easy using AGETFILEVERSION(). But, how do I get the name of the DLL?

If you have the ProgID, you can spin through HKEY_CLASSES_ROOT\CLSID; the InProcServer32 registry entry's Default value, at the same level as the ProgID registry entry that matches your server, points to the .DLL that provides the service. If you find a LocalServer32 entry, that's a local, out-of-process server, and you should find the command line used to launch the associated automation server.