[dartos]

Can you call os level functions from an excel macro?

Can you access raw memory from it?

If the answer to either of those is no, then that’s a big difference.

[meibo]

You can call any native or COM function from VBA, the only real limitation is that it's strictly single-threaded(-ish).

[hnlmorg]

Yes you can. VBA can make the same Win32 API calls as VB6. Something I exploited back in the tail end of the 90s.

[anthk]

COM/OLE. Old as hell. Macro viruses in Office/Outlook has been a shitfest since late 90's.

[nradov]

You can call Windows API functions from VBA.