void CMDIChildWnd::OnUpdateFrameMenu(BOOL bActivate, CWnd* pActivateWnd,
HMENU hMenuAlt)
{
CMDIFrameWnd* pFrame = GetMDIFrame();
if (hMenuAlt == NULL && bActivate)
{
// attempt to get default menu from document
CDocument* pDoc = GetActiveDocument();
if (pDoc != NULL)
hMenuAlt = pDoc->GetDefaultMenu();
}
// use default menu stored in frame if none from document
if (hMenuAlt == NULL)
hMenuAlt = m_hMenuShared;
if (hMenuAlt != NULL && bActivate)
{
ASSERT(pActivateWnd == this);
// activating child, set parent menu
::SendMessage(pFrame->m_hWndMDIClient, WM_MDISETMENU,
(WPARAM)hMenuAlt, (LPARAM)pFrame->GetWindowMenuPopup(hMenuAlt));
}
else if (hMenuAlt != NULL && !bActivate && pActivateWnd == NULL)
{
// destroying last child
HMENU hMenuLast = NULL;
::SendMessage(pFrame->m_hWndMDIClient, WM_MDISETMENU,
(WPARAM)pFrame->m_hMenuDefault, (LPARAM)hMenuLast);
}
else
{
// refresh MDI Window menu (even if non-shared menu)
::SendMessage(pFrame->m_hWndMDIClient, WM_MDIREFRESHMENU, 0, 0);
}
}
