ActiveX - Registry - Control List (Simple I'm sure, lol)

Hey all,
I know there are programs out there that do this already, I'm just been trying to figure out how, but with no success.

I want to be able to retrieve a list of all registered ActiveX components and contols from the registry. Similar to what happens when you insert a new control in the ActiveX Control Test Container application and you get a list of registered controls to choose from. Is there an API (like with EnumFonts) that can help with this?

Any help would be much appreciated.

Thanks,
Tony