How to get CLSID variable name, like MSVC?

When you are debugging a program and you hover over a GUID variable, MSVC retrieves both the variable name (e.g. CLSID_FilterGraph) and the human name (e.g. Filter Graph Object).

It does the second by looking at HKCR\CLSID\GUID - but where does it get the variable name from?? It's not in the registry.

Any id开发者_开发知识库eas?

The debugging info in the .pdb, probably. It just needs to iterate the CLSIDs defined in the mumble_i.c file generated by MIDL. No problem matching them, they are after all globally unique :)