vc 添加提示

 1.CToolTipCtrl   m_tooltip;//添加类变量，私有变量
2.OnInitDialog()中添加
                                  m_tooltip.Create(this);
                                  m_tooltip.AddTool(GetDlgItem(IDOK),"点击此处确认退出");
                                  m_tooltip.AddTool(GetDlgItem(IDCANCEL),"点击此处确认退出");
3.重载虚函数：PreTranslateMessage(MSG* pMsg)
                         添加代码：
                           if ( m_tooltip )
                            {
                                m_tooltip.RelayEvent( pMsg );
                            }