




The class document-frame is used to implement Multiple-Document Interface (MDI) which is a standard technique on Microsoft Windows (see the MSDN for documentation).
To use MDI in the CAPI, define an interface class that inherits from document-frame, and use the two special slots capi:container and capi:windows-menu. For the details and an example, see Multiple-Document Interface (MDI).
capi:windows-menu is a special slot in document-frame and this symbol should not appear elsewhere in the define-interface form.
CAPI User Guide and Reference Manual (Macintosh version) - 25 Feb 2015