Then if you have access to public libraries, maybe one of them has one of the several Microsoft Systems Journals issues, later MSDN Magazine, with plenty of low level COM articles.
COM is from the days where good documentation was to be found in books, not on the Interwebs.
Essential COM by Don Box
https://www.amazon.com/Essential-COM-Don-Box/dp/0201634465
Inside COM by Dale Rogerson
https://www.amazon.com/Inside-Microsoft-Programming-Dale-Rog...
Then if you have access to public libraries, maybe one of them has one of the several Microsoft Systems Journals issues, later MSDN Magazine, with plenty of low level COM articles.
COM is from the days where good documentation was to be found in books, not on the Interwebs.