The Imbedded Interface Point (IIP) for VLF-ONE the component specified in the Framework's Details tab.
To get there menu (Framework) --> (Properties...) --> Framework Details tab.
The option is VLF-ONE User Imbedded Interface Point: (Id).
The shipped examples are UF_OSYSTM and DF_OSYSTM.
You should not use either of these in a production application.
Refer to the source code of UF_OSYSTM for details of how to make your own version.