I know enough to use the following to change the MDI MainFrame menu:

CMenu newmenu;
 newmenu.LoadMenu(IDR_CUSTOMMENU);
AfxGetMainWnd()->SetMenu(&newmenu);
 AfxGetMainWnd()->DrawMenuBar();
 newmenu.Detach();

But where is the best place to put it so that it remains permanent when I
open new documents and views? I've tried just about everywhere I can think
(View,App,Mainframe,ChildFrame). The best was:

CChildFrame::OnMDIActivate

but this caused lot's of flashing with the default menu bar.
--

======================================
Brent Corkum
Rocscience Inc.
ph: (416) 978 4576
fax: (416) 978 8906

web: http://www.*-*-*.com/
======================================

Have you tried using WM_MDISETMENU rather than SetMenu?

Looking at the MFC source code shows that MFC switches the menu in
CMDIFrameWnd::OnUpdateFrameMenu and CMDIChildWnd::OnUpdateFrameMenu,
so if you can override them, that may be a better choice.

Dave
----
Address is altered to discourage junk mail.
Remove ".---" for the real address.

The way I did it was to destroy the old Mainframe's menu and add my new one.
Then set the 'm_hMe{*filter*}fault' member to your new menu.
The problem then is that the Document/View templates cache their menus
so you need to replace these as well.  To get around this if you are using
MDI
derive a class from CMultiDocTemplate, and add the following member to it

void CCustomMultiDocTemplate::ReloadResources()
{
                    // Free the menu
    if (m_hMenuShared != NULL)
    {
        ::DestroyMenu(m_hMenuShared);
    }

    // Free the accelarator table
    if (m_hAccelTable != NULL)
         ::FreeResource((HGLOBAL)m_hAccelTable);

// Reload
     CDocTemplate::LoadTemplate();

// Change this to Load whatever menu you want
      HINSTANCE hInst =
AfxFindResourceHandle(MAKEINTRESOURCE(m_nIDResource), RT_MENU);

// Change this to Load whatever menu you want
      m_hMenuShared = ::LoadMenu(hInst, MAKEINTRESOURCE(m_nIDResource));

      m_hAccelTable = ::LoadAccelerators(hInst,
MAKEINTRESOURCE(m_nIDResource));

Then when you want to change menus do something like the following

    POSITION pos = AfxGetApp()->GetFirstDocTemplatePosition();

    CCustomMultiDocTemplate* pCCustomMultiDocTemplate;

    while (pos != NULL)
    {
        pCCustomMultiDocTemplate =
dynamic_cast<CCustomMultiDocTemplate*>(AfxGetApp()->GetNextDocTemplate(pos))
;

        pCCustomMultiDocTemplate->ReloadResources();
    }

The code above needs modified slightly to suit your needs, but you should
get the general idea.

Nic