OnClick()
{
   m_CtreeCtrl.GetSelectedItem();
   CString s=m_CtreeCtrl.GetItemText();
   if(s=="view1")
      //如何显示视图1和里头的控件CListCtrl,视图的基类是CListView,
   if(s=="view2")
     //如何显示视图2...
   if(s=="view2")
    //      
}