MFC对话框响应ON_UPDATE_COMMAND_UI事件

以对话框为父窗口创建的菜单，菜单响应函数可以写在对话框类中。

菜单响应函数的映射和普通菜单响应映射一样。

但是菜单状态更新命令，需要特殊处理。

BEGIN_MESSAGE_MAP(CDlg, CDialogEx)
    ON_WM_INITMENU()
    ON_WM_INITMENUPOPUP()
    // 大气象
    ON_UPDATE_COMMAND_UI_RANGE(1001,1002,&OnMenuItemUI)
END_MESSAGE_MAP()

// 设置Check或Enable
void CDlg::OnMenuItemUI(CCmdUI *pCmdUI)
{
    if (pCmdUI->m_nID == 1001)
    {
        pCmdUI->SetCheck(1);
    }
    if (pCmdUI->m_nID == 1002)
    {
        pCmdUI->Enable(FALSE);
    }
}

BOOL CDlg::OnInitDialog()
{
    CDialogEx::OnInitDialog();

    // TODO:  在此添加额外的初始化
    CMenu menuMain;
    menuMain.CreateMenu();

    CMenu menuChild;
    menuChild.CreatePopupMenu();
    menuChild.AppendMenu(MF_STRING,1001,"menu1");
    menuChild.AppendMenu(MF_STRING,1002,"menu2");

    menuMain.AppendMenu(MF_POPUP,(UINT)menuChild.Detach(),"menu0");

    SetMenu(&menuMain);
    menuMain.Detach();

    return TRUE;  // return TRUE unless you set the focus to a control
    // 异常: OCX 属性页应返回 FALSE
}
// 大气象：需要在这里做特殊处理。
void CDlg::OnInitMenuPopup(CMenu* pPopupMenu, UINT nIndex, BOOL bSysMenu)
{
    CDialogEx::OnInitMenuPopup(pPopupMenu, nIndex, bSysMenu);

    // TODO: 在此处添加消息处理程序代码
    CCmdUI state; 
    state.m_pMenu = pPopupMenu; 
    ASSERT(state.m_pOther == NULL); 
    ASSERT(state.m_pParentMenu == NULL); 

    // Determine if menu is popup in top-level menu and set m_pOther to 
    // it if so (m_pParentMenu == NULL indicates that it is secondary popup). 
    HMENU hParentMenu; 
    if (AfxGetThreadState()->m_hTrackingMenu == pPopupMenu->m_hMenu) 
        state.m_pParentMenu = pPopupMenu;    // Parent == child for tracking popup. 
    else if ((hParentMenu = ::GetMenu(m_hWnd)) != NULL) 
    { 
        CWnd* pParent = this; 
        // Child windows don't have menus--need to go to the top! 
        if (pParent != NULL && 
            (hParentMenu = ::GetMenu(pParent->m_hWnd)) != NULL) 
        { 
            int nIndexMax = ::GetMenuItemCount(hParentMenu); 
            for (int nIndex = 0; nIndex < nIndexMax; nIndex++) 
            { 
                if (::GetSubMenu(hParentMenu, nIndex) == pPopupMenu->m_hMenu) 
                { 
                    // When popup is found, m_pParentMenu is containing menu. 
                    state.m_pParentMenu = CMenu::FromHandle(hParentMenu); 
                    break; 
                } 
            } 
        } 
    } 

    state.m_nIndexMax = pPopupMenu->GetMenuItemCount(); 
    for (state.m_nIndex = 0; state.m_nIndex < state.m_nIndexMax; 
        state.m_nIndex++) 
    { 
        state.m_nID = pPopupMenu->GetMenuItemID(state.m_nIndex); 
        if (state.m_nID == 0) 
            continue; // Menu separator or invalid cmd - ignore it. 

        ASSERT(state.m_pOther == NULL); 
        ASSERT(state.m_pMenu != NULL); 
        if (state.m_nID == (UINT)-1) 
        { 
            // Possibly a popup menu, route to first item of that popup. 
            state.m_pSubMenu = pPopupMenu->GetSubMenu(state.m_nIndex); 
            if (state.m_pSubMenu == NULL || 
                (state.m_nID = state.m_pSubMenu->GetMenuItemID(0)) == 0 || 
                state.m_nID == (UINT)-1) 
            { 
                continue;       // First item of popup can't be routed to. 
            } 
            state.DoUpdate(this, TRUE);   // Popups are never auto disabled. 
        } 
        else 
        { 
            // Normal menu item. 
            // Auto enable/disable if frame window has m_bAutoMenuEnable 
            // set and command is _not_ a system command. 
            state.m_pSubMenu = NULL; 
            state.DoUpdate(this, FALSE); 
        } 

        // Adjust for menu deletions and additions. 
        UINT nCount = pPopupMenu->GetMenuItemCount(); 
        if (nCount < state.m_nIndexMax) 
        { 
            state.m_nIndex -= (state.m_nIndexMax - nCount); 
            while (state.m_nIndex < nCount && 
                pPopupMenu->GetMenuItemID(state.m_nIndex) == state.m_nID) 
            { 
                state.m_nIndex++; 
            } 
        } 
        state.m_nIndexMax = nCount; 
    } 
}
// 大气象：注意不是这里
void CDlg::OnInitMenu(CMenu* pMenu)
{
    CDialogEx::OnInitMenu(pMenu);

    // TODO: 在此处添加消息处理程序代码
}

对话框里创建的菜单，响应函数可以写在其他类。
需要源码的，留下邮箱索取。
url:http://greatverve.cnblogs.com/archive/2012/11/28/dlg-on-update-command-ui.html 
参考：
http://support.microsoft.com/kb/242577/zh-cn
http://greatverve.cnblogs.com/archive/2012/11/21/mfc-dlg-menu-cmd.html