急急急，今晚在线等待........(对话框菜单问题)

Question

我建立了一个基于对话框的程序，我想在运行过程中将某菜单屏蔽不可用，但根本无效，同时我想使用某菜单项为选中状态(利用SetCheck(1))也根本无效，
    不知什么原因？？？？？
    感谢你的帮助！！！！！！！！

Answer 1

TO: oldworm(oldworm) 
    不是吧太多了一不小心我的贴子就掉到后面了..............

Answer 2

应该可以的: CMenu *pMenu = GetMenu()->GetSubMenu(0);
pMenu->EnableMenuItem(ID_MENUID,MF_DISABLED|MF_GRAYED);

Answer 3

是不是系统菜单呀！CMenu *pMenu = GetSystemMenu()->GetSubMenu(0);
pMenu->EnableMenuItem(ID_MENUID,MF_DISABLED|MF_GRAYED);

Answer 4

添加 消息映射 ON_WM_INITMENUPOPUPBEGIN_MESSAGE_MAP(CTestDlg, CDialog)
//{{AFX_MSG_MAP(CTestDlg)
                        ........................
                        ........................
//}}AFX_MSG_MAPON_WM_INITMENUPOPUP()
END_MESSAGE_MAP() 
void CTestDlg::OnInitMenuPopup(CMenu *pPopupMenu, UINT nIndex,BOOL bSysMenu)
{
    ASSERT(pPopupMenu != NULL);
    // Check the enabled state of various menu items.    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;
    }
}