Make a refguid object from a hex string.
A string in the standard hex format for GUIDs.
A symbol naming a COM interface. If non-nil, the refguid will be will added to the table of known refguids.
A refguid object matching string.
make-guid-from-string makes a refguid object from string. If the GUID data matches a known refguid, then that is returned. Otherwise, a new refguid is created and returned. If interface-name is non-nil, then the table of known refguids is updated. If the GUID is already known under a different name, an error is signaled.
This GUID is a predefined one for i-unknown:
LispWorks COM/Automation User Guide and Reference Manual - 14 Feb 2015