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 (Windows version) - 3 Aug 2017