COM: How to get CLSID? Can I use Prog-Id?

Question

If I have a well-known COM library (the .ocx file itself), is there a way in C # to extract CLSID information? Basically I need the same information from a file. Visual Studio adds to the project file when you add a link to the file. Can they be extracted from the ocx file directly or by searching the registry?

Also, if I know prog-id, how can I find the CLSID and the corresponding ocx file?

Thanks for helping the newbie COM!

Answer 1

LoadTypeLib CLSIDFromProgID