Re: Substituting the main menu bar(s)

"David Webber" <>
Sun, 4 Jun 2006 15:40:22 +0100
"Ajay Kalra" <> wrote in message

But even so, the program knows about two menus: one for when an MDI
is open, and one for when one isn't. I need to replace both.

You can do that as well...

Thanks Ajay,

I have been exploring the MFC source code and I think I can make it work.

For the menus shown when there is a document present then from the CWinApp
derived class one can do

    POSITION pos = GetFirstDocTemplatePosition();

    while( pos )
        CDocTemplate *pDocTemplate = GetNextDocTemplate( pos );

        // Cast this UP to CMultiDocTemplate - it is one!
        // Replace its m_hMenuShared with my new HMENU for the document.

I am a bit nervous about needing the upward cast (on the principle that
something is usually awry if an upward cast is needed) but I can use
IsKindOf to check the legality, and it works. And there seems to be no way
round it.

For the menu when no document is present, as you say, I can replace the
m_hMenuDefault of the base class of my main frame window.

Now I need to be tidy. I am assuming that each document type stores a menu
handle in its CMultiDocTemplate::m_hMenuShared and the menu for no document
open is stored in CFrameWnd::m_hMenuDefault, AND that MFC simply uses
SetMenu() to select between them as document windows open and close, without
destroying the previously selected menu.

If so, when I replace the stored menus, it looks like I should be destroying
the old menus and simply using SetMenu() using the appropriate one of the
new ones.

I'll suck it and see.

David Webber
Author MOZART the music processor for Windows -
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