You're referring to the Windows API, right? (Win32, I'm assuming.)
Look
here. There are several entry points to this info; this is one of the more easily accessible ones (functions in alphabetical order).
Note: Because of the way those pages (now known as "Microsoft Learn") are organized (or not!), the search boxes won't always find what you're looking for. Some pages will have two search boxes; if one doesn't work, try the other one. Also, the link I gave you is to a "previous versions" page. If you click through to a function you're looking for, you'll then be on a non-previous version page, which gives you different search results. It's all very confusing, but there's a ton of info there.