如何在所有者描述的MFC CMenu派生菜单中显示复选框？

class CMyMenu : public CMenu
{
public:
    virtual BOOL PreCreateWindow(CREATESTRUCT& cs)
    {
        cs.style |= MNS_CHECKORBMP;
        return CMenu::PreCreateWindow(cs);
    }

    virtual void MeasureItem(LPMEASUREITEMSTRUCT lpMeasureItemStruct)
    {
        lpMeasureItemStruct->itemHeight = 20; // 设置菜单项的高度
        lpMeasureItemStruct->itemWidth = 200; // 设置菜单项的宽度
    }

    virtual void DrawItem(LPDRAWITEMSTRUCT lpDrawItemStruct)
    {
        CDC dc;
        dc.Attach(lpDrawItemStruct->hDC);

        // 绘制复选框
        CRect rect = lpDrawItemStruct->rcItem;
        rect.left += 20; // 调整复选框的位置
        rect.right = rect.left + 13; // 设置复选框的大小
        dc.DrawFrameControl(rect, DFC_BUTTON, DFCS_BUTTONCHECK | (lpDrawItemStruct->itemState & ODS_CHECKED ? DFCS_CHECKED : 0));

        // 绘制文本
        CString strText;
        GetMenuString(lpDrawItemStruct->hwndItem, lpDrawItemStruct->itemID, strText, MF_BYCOMMAND);
        rect.left += 20; // 调整文本的位置
        dc.DrawText(strText, rect, DT_SINGLELINE | DT_VCENTER);

        dc.Detach();
    }
};