A COM interface pointer.
A string or a refguid giving a CLSID to create.
A string giving a ProgID to create.
Registers interface-ptr in the system Running Object Table for a specific coclass that the application implements. The coclass can be specified directly by using the clsid argument or indirectly using the progid argument, which will locate the CLSID from the registry.
The returned value token can be used with revoke-active-object to revoke the registration.
LispWorks COM/Automation User Guide and Reference Manual - 19 Dec 2011