The Lisp name for the IUnknown COM interface.
com
The COM interface type i-unknown is the name given to the IUnknown COM interface within Lisp. The name results from the standard mapping described in 1.3 The mapping from COM names to Lisp symbols.
(query-interface ptr 'i-unknown)
COM/Automation User Guide and Reference Manual - 01 Dec 2021 19:38:38