C++模板会使代码膨胀吗

今天和同事说到C++模板会使代码膨胀, 可同事觉得不会。
同事的依据是: 如果模板会使代码膨胀, 那么ATL和WTL里为什么还要大量使用模板? 同样功能 ,ATL和WTL编译出的可执行文件可比MFC编译的要小的多。
我当时一愣 ,事实确实如同事所说,难道模板会使代码膨胀的观点是错误的吗?

MFC因为本身代码量和复杂性在那里, 所以它生成比较大的exe无可厚非。我们这里重点关注为什么ATL/WTL使用模板,但是却不会使生成的exe变大。

我们知道使用模板时, 同一模板生成不同的模板实类后会是多份代码 ,比如 vector<int>, vector<char>, vector<double>, 这里总共会生成3份不同的vector代码,这就是我们平时所说的代码膨胀。

那么为什么ATL/WTL就没有代码膨胀的问题呢? 
我这里以 ATL里的窗口代码为例来分析这个问题,因为我对WinDbg比较熟悉,下面我会以WinDbg为工具来分析我以前的写得那个俄罗斯方块程序。

首先我们看一下ATL的窗口代码:
template < class  T,  class  TBase  /*  = CWindow  */ class  TWinTraits  /*  = CControlWinTraits  */ >
class  ATL_NO_VTABLE CWindowImpl :  public  CWindowImplBaseT< TBase, TWinTraits >
{
public :
    DECLARE_WND_CLASS(NULL)

     static  LPCTSTR GetWndCaption()
    {
         return  NULL;
    }

    HWND Create(HWND hWndParent, _U_RECT rect = NULL, LPCTSTR szWindowName = NULL,
            DWORD dwStyle = 0, DWORD dwExStyle = 0,
            _U_MENUorID MenuOrID = 0U, LPVOID lpCreateParam = NULL)
    {
         if  (T::GetWndClassInfo().m_lpszOrigName == NULL)
            T::GetWndClassInfo().m_lpszOrigName = GetWndClassName();
        ATOM atom = T::GetWndClassInfo().Register(&m_pfnSuperWindowProc);

        dwStyle = T::GetWndStyle(dwStyle);
        dwExStyle = T::GetWndExStyle(dwExStyle);

         //  set caption
         if  (szWindowName == NULL)
            szWindowName = T::GetWndCaption();

         return  CWindowImplBaseT< TBase, TWinTraits >::Create(hWndParent, rect, szWindowName,
            dwStyle, dwExStyle, MenuOrID, atom, lpCreateParam);
    }
};
上面是一个模板类,它应该会生成多份模板实例代码:我们可以用WinDbg的符号搜索命令来做验证:
输入 x HYTeris!ATL::CWindowImpl<* , 搜索所有以 HYTeris!ATL::CWindowImpl< 开头的符号
0:000> x HYTeris!ATL::CWindowImpl<*
004592f0 HYTeris!ATL::CWindowImpl<CTsButton,WTL::CButtonT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::Create ( struct  HWND__ *,  class  ATL::_U_RECT, wchar_t *, unsigned  long , unsigned  long class  ATL::_U_MENUorID,  void  *)
004343a0 HYTeris!ATL::CWindowImpl<CTsMainStatusPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::~CWindowImpl<CTsMainStatusPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> > ( void )
00437c90 HYTeris!ATL::CWindowImpl<CTsMainControlPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::GetWndCaption ( void )
00430440 HYTeris!ATL::CWindowImpl<CTsGameMainWnd,ATL::CWindow,ATL::CWinTraits<114229248,262400> >::CWindowImpl<CTsGameMainWnd,ATL::CWindow,ATL::CWinTraits<114229248,262400> > ( void )
0041c990 HYTeris!ATL::CWindowImpl<CTsAgentWindow,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::GetWndCaption ( void )
0044cf50 HYTeris!ATL::CWindowImpl<CTsNextElementContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::~CWindowImpl<CTsNextElementContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> > ( void )
004539a0 HYTeris!ATL::CWindowImpl<CTsMutiScoreContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::Create ( struct  HWND__ *,  class  ATL::_U_RECT, wchar_t *, unsigned  long , unsigned  long class  ATL::_U_MENUorID,  void  *)
00435800 HYTeris!ATL::CWindowImpl<CTsGameMainWnd,ATL::CWindow,ATL::CWinTraits<114229248,262400> >::Create ( struct  HWND__ *,  class  ATL::_U_RECT, wchar_t *, unsigned  long , unsigned  long class  ATL::_U_MENUorID,  void  *)
00434640 HYTeris!ATL::CWindowImpl<CTsKeyEdit,WTL::CEditT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::~CWindowImpl<CTsKeyEdit,WTL::CEditT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> > ( void )
00437440 HYTeris!ATL::CWindowImpl<CTsGameMainWnd,ATL::CWindow,ATL::CWinTraits<114229248,262400> >::GetWndCaption ( void )
00436020 HYTeris!ATL::CWindowImpl<CTsMainButtonPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::Create ( struct  HWND__ *,  class  ATL::_U_RECT, wchar_t *, unsigned  long , unsigned  long class  ATL::_U_MENUorID,  void  *)
00453f70 HYTeris!ATL::CWindowImpl<CTsNextElementContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::GetWndCaption ( void )
00424e30 HYTeris!ATL::CWindowImpl<CTsDisplayContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::~CWindowImpl<CTsDisplayContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> > ( void )
004338a0 HYTeris!ATL::CWindowImpl<CTsMainButtonPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::~CWindowImpl<CTsMainButtonPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> > ( void )
0041c4f0 HYTeris!ATL::CWindowImpl<CTsAgentWindow,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::Create ( struct  HWND__ *,  class  ATL::_U_RECT, wchar_t *, unsigned  long , unsigned  long class  ATL::_U_MENUorID,  void  *)
00441b50 HYTeris!ATL::CWindowImpl<CTsKeyEdit,WTL::CEditT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::CWindowImpl<CTsKeyEdit,WTL::CEditT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> > ( void )
004365f0 HYTeris!ATL::CWindowImpl<CTsMainControlPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::Create ( struct  HWND__ *,  class  ATL::_U_RECT, wchar_t *, unsigned  long , unsigned  long class  ATL::_U_MENUorID,  void  *)
00455120 HYTeris!ATL::CWindowImpl<CTsButton,WTL::CButtonT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::CWindowImpl<CTsButton,WTL::CButtonT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> > ( void )
0040ea20 HYTeris!ATL::CWindowImpl<CTsDisplayContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::Create ( struct  HWND__ *,  class  ATL::_U_RECT, wchar_t *, unsigned  long , unsigned  long class  ATL::_U_MENUorID,  void  *)
00453fa0 HYTeris!ATL::CWindowImpl<CTsSingleScoreContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::GetWndCaption ( void )
0041abc0 HYTeris!ATL::CWindowImpl<CTsAgentWindow,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::CWindowImpl<CTsAgentWindow,ATL::CWindow,ATL::CWinTraits<1442840576,0> > ( void )
00459c20 HYTeris!ATL::CWindowImpl<CTsSubControlContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::CWindowImpl<CTsSubControlContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> > ( void )
0045f640 HYTeris!ATL::CWindowImpl<CTsUserListCtrl,WTL::CListViewCtrlT<ATL::CWindow>,ATL::CWinTraitsOR<32777,0,ATL::CWinTraits<1442840576,0> > >::Create ( struct  HWND__ *,  class  ATL::_U_RECT, wchar_t *, unsigned  long , unsigned  long class  ATL::_U_MENUorID,  void  *)
004608a0 HYTeris!ATL::CWindowImpl<CTsSingleControlPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::GetWndClassInfo ( void )
0045fed0 HYTeris!ATL::CWindowImpl<CTsSingleControlPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::Create ( struct  HWND__ *,  class  ATL::_U_RECT, wchar_t *, unsigned  long , unsigned  long class  ATL::_U_MENUorID,  void  *)
00433a70 HYTeris!ATL::CWindowImpl<CTsMainControlPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::CWindowImpl<CTsMainControlPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> > ( void )
00437c60 HYTeris!ATL::CWindowImpl<CTsMainStatusPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::GetWndCaption ( void )
0044fb70 HYTeris!ATL::CWindowImpl<CTsMainDisplayPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::~CWindowImpl<CTsMainDisplayPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> > ( void )
0041acf0 HYTeris!ATL::CWindowImpl<CTsAgentWindow,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::~CWindowImpl<CTsAgentWindow,ATL::CWindow,ATL::CWinTraits<1442840576,0> > ( void )
00459510 HYTeris!ATL::CWindowImpl<CTsButton,WTL::CButtonT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::GetWndCaption ( void )
00437a90 HYTeris!ATL::CWindowImpl<CTsMainButtonPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::GetWndCaption ( void )
00430490 HYTeris!ATL::CWindowImpl<CTsGameMainWnd,ATL::CWindow,ATL::CWinTraits<114229248,262400> >::~CWindowImpl<CTsGameMainWnd,ATL::CWindow,ATL::CWinTraits<114229248,262400> > ( void )
00424de0 HYTeris!ATL::CWindowImpl<CTsDisplayContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::CWindowImpl<CTsDisplayContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> > ( void )
00433ac0 HYTeris!ATL::CWindowImpl<CTsMainControlPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::~CWindowImpl<CTsMainControlPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> > ( void )
00433850 HYTeris!ATL::CWindowImpl<CTsMainButtonPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::CWindowImpl<CTsMainButtonPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> > ( void )
00433b60 HYTeris!ATL::CWindowImpl<CTsMainStatusPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::CWindowImpl<CTsMainStatusPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> > ( void )
00452050 HYTeris!ATL::CWindowImpl<CTsMutiScoreContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::CWindowImpl<CTsMutiScoreContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> > ( void )
0044f8e0 HYTeris!ATL::CWindowImpl<CTsMainDisplayPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::CWindowImpl<CTsMainDisplayPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> > ( void )
0044cec0 HYTeris!ATL::CWindowImpl<CTsNextElementContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::CWindowImpl<CTsNextElementContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> > ( void )
004340e0 HYTeris!ATL::CWindowImpl<CTsSingleControlPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::~CWindowImpl<CTsSingleControlPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> > ( void )
00433ef0 HYTeris!ATL::CWindowImpl<CTsButton,WTL::CButtonT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::~CWindowImpl<CTsButton,WTL::CButtonT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> > ( void )
004348c0 HYTeris!ATL::CWindowImpl<CTsUserListCtrl,WTL::CListViewCtrlT<ATL::CWindow>,ATL::CWinTraitsOR<32777,0,ATL::CWinTraits<1442840576,0> > >::~CWindowImpl<CTsUserListCtrl,WTL::CListViewCtrlT<ATL::CWindow>,ATL::CWinTraitsOR<32777,0,ATL::CWinTraits<1442840576,0> > > ( void )
004535b0 HYTeris!ATL::CWindowImpl<CTsNextElementContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::Create ( struct  HWND__ *,  class  ATL::_U_RECT, wchar_t *, unsigned  long , unsigned  long class  ATL::_U_MENUorID,  void  *)
00454170 HYTeris!ATL::CWindowImpl<CTsMutiScoreContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::GetWndCaption ( void )
00459c70 HYTeris!ATL::CWindowImpl<CTsSubControlContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::~CWindowImpl<CTsSubControlContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> > ( void )
00451ed0 HYTeris!ATL::CWindowImpl<CTsSingleScoreContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::CWindowImpl<CTsSingleScoreContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> > ( void )
00451f20 HYTeris!ATL::CWindowImpl<CTsSingleScoreContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::~CWindowImpl<CTsSingleScoreContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> > ( void )
0045c4b0 HYTeris!ATL::CWindowImpl<CTsSingleControlPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::CWindowImpl<CTsSingleControlPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> > ( void )
00436320 HYTeris!ATL::CWindowImpl<CTsMainStatusPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::Create ( struct  HWND__ *,  class  ATL::_U_RECT, wchar_t *, unsigned  long , unsigned  long class  ATL::_U_MENUorID,  void  *)
004536a0 HYTeris!ATL::CWindowImpl<CTsSingleScoreContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::Create ( struct  HWND__ *,  class  ATL::_U_RECT, wchar_t *, unsigned  long , unsigned  long class  ATL::_U_MENUorID,  void  *)
004604a0 HYTeris!ATL::CWindowImpl<CTsUserListCtrl,WTL::CListViewCtrlT<ATL::CWindow>,ATL::CWinTraitsOR<32777,0,ATL::CWinTraits<1442840576,0> > >::GetWndCaption ( void )
0040eca0 HYTeris!ATL::CWindowImpl<CTsDisplayContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::GetWndCaption ( void )
0045ff90 HYTeris!ATL::CWindowImpl<CTsSubControlContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::GetWndCaption ( void )
00437cc0 HYTeris!ATL::CWindowImpl<CTsMainDisplayPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::GetWndCaption ( void )
004366e0 HYTeris!ATL::CWindowImpl<CTsMainDisplayPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::Create ( struct  HWND__ *,  class  ATL::_U_RECT, wchar_t *, unsigned  long , unsigned  long class  ATL::_U_MENUorID,  void  *)
0045e620 HYTeris!ATL::CWindowImpl<CTsSubControlContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::Create ( struct  HWND__ *,  class  ATL::_U_RECT, wchar_t *, unsigned  long , unsigned  long class  ATL::_U_MENUorID,  void  *)
004608d0 HYTeris!ATL::CWindowImpl<CTsSingleControlPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::GetWndCaption ( void )
004520a0 HYTeris!ATL::CWindowImpl<CTsMutiScoreContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::~CWindowImpl<CTsMutiScoreContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> > ( void )
0045d210 HYTeris!ATL::CWindowImpl<CTsUserListCtrl,WTL::CListViewCtrlT<ATL::CWindow>,ATL::CWinTraitsOR<32777,0,ATL::CWinTraits<1442840576,0> > >::CWindowImpl<CTsUserListCtrl,WTL::CListViewCtrlT<ATL::CWindow>,ATL::CWinTraitsOR<32777,0,ATL::CWinTraits<1442840576,0> > > ( void )
004d84a8 HYTeris!ATL::CWindowImpl<CTsMainControlPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Class Hierarchy Descriptor' = <no type information>
004d84b8 HYTeris!ATL::CWindowImpl<CTsMainControlPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Array' = <no type information>
004d7970 HYTeris!ATL::CWindowImpl<CTsAgentWindow,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Array' = <no type information>
004d7960 HYTeris!ATL::CWindowImpl<CTsAgentWindow,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Class Hierarchy Descriptor' = <no type information>
004d914c HYTeris!ATL::CWindowImpl<CTsSubControlContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Descriptor at (0,-1,0,64)' = <no type information>
004d8dd0 HYTeris!ATL::CWindowImpl<CTsMutiScoreContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Descriptor at (0,-1,0,64)' = <no type information>
004d8b04 HYTeris!ATL::CWindowImpl<CTsMainDisplayPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Class Hierarchy Descriptor' = <no type information>
004d8b14 HYTeris!ATL::CWindowImpl<CTsMainDisplayPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Array' = <no type information>
004d8ae8 HYTeris!ATL::CWindowImpl<CTsMainDisplayPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Descriptor at (0,-1,0,64)' = <no type information>
004e31b8 HYTeris!ATL::CWindowImpl<CTsSingleControlPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> > `RTTI Type Descriptor' = <no type information>
004e2980 HYTeris!ATL::CWindowImpl<CTsMainDisplayPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> > `RTTI Type Descriptor' = <no type information>
004d88c4 HYTeris!ATL::CWindowImpl<CTsKeyEdit,WTL::CEditT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Descriptor at (0,-1,0,64)' = <no type information>
004d8330 HYTeris!ATL::CWindowImpl<CTsMainButtonPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Descriptor at (0,-1,0,64)' = <no type information>
004d88f0 HYTeris!ATL::CWindowImpl<CTsKeyEdit,WTL::CEditT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Array' = <no type information>
004d88e0 HYTeris!ATL::CWindowImpl<CTsKeyEdit,WTL::CEditT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::`RTTI Class Hierarchy Descriptor' = <no type information>
004d8a40 HYTeris!ATL::CWindowImpl<CTsNextElementContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Descriptor at (0,-1,0,64)' = <no type information>
004e30f0 HYTeris!ATL::CWindowImpl<CTsSubControlContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> > `RTTI Type Descriptor' = <no type information>
004d8a5c HYTeris!ATL::CWindowImpl<CTsNextElementContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Class Hierarchy Descriptor' = <no type information>
004d8a6c HYTeris!ATL::CWindowImpl<CTsNextElementContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Array' = <no type information>
004e21d0 HYTeris!ATL::CWindowImpl<CTsMainStatusPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> > `RTTI Type Descriptor' = <no type information>
004d8c70 HYTeris!ATL::CWindowImpl<CTsSingleScoreContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Descriptor at (0,-1,0,64)' = <no type information>
004e2e78 HYTeris!ATL::CWindowImpl<CTsButton,WTL::CButtonT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> > `RTTI Type Descriptor' = <no type information>
004e1f00 HYTeris!ATL::CWindowImpl<CTsGameMainWnd,ATL::CWindow,ATL::CWinTraits<114229248,262400> > `RTTI Type Descriptor' = <no type information>
004d9208 HYTeris!ATL::CWindowImpl<CTsSingleControlPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Class Hierarchy Descriptor' = <no type information>
004d9218 HYTeris!ATL::CWindowImpl<CTsSingleControlPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Array' = <no type information>
004e1ad8 HYTeris!ATL::CWindowImpl<CTsDisplayContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> > `RTTI Type Descriptor' = <no type information>
004d834c HYTeris!ATL::CWindowImpl<CTsMainButtonPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Class Hierarchy Descriptor' = <no type information>
004d835c HYTeris!ATL::CWindowImpl<CTsMainButtonPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Array' = <no type information>
004d8c9c HYTeris!ATL::CWindowImpl<CTsSingleScoreContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Array' = <no type information>
004d8c8c HYTeris!ATL::CWindowImpl<CTsSingleScoreContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Class Hierarchy Descriptor' = <no type information>
004d856c HYTeris!ATL::CWindowImpl<CTsMainStatusPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Array' = <no type information>
004d855c HYTeris!ATL::CWindowImpl<CTsMainStatusPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Class Hierarchy Descriptor' = <no type information>
004e2bb8 HYTeris!ATL::CWindowImpl<CTsMutiScoreContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> > `RTTI Type Descriptor' = <no type information>
004d7fa0 HYTeris!ATL::CWindowImpl<CTsDisplayContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Class Hierarchy Descriptor' = <no type information>
004d7fb0 HYTeris!ATL::CWindowImpl<CTsDisplayContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Array' = <no type information>
004d91ec HYTeris!ATL::CWindowImpl<CTsSingleControlPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Descriptor at (0,-1,0,64)' = <no type information>
004e2048 HYTeris!ATL::CWindowImpl<CTsMainButtonPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> > `RTTI Type Descriptor' = <no type information>
004d8174 HYTeris!ATL::CWindowImpl<CTsGameMainWnd,ATL::CWindow,ATL::CWinTraits<114229248,262400> >::`RTTI Class Hierarchy Descriptor' = <no type information>
004d8184 HYTeris!ATL::CWindowImpl<CTsGameMainWnd,ATL::CWindow,ATL::CWinTraits<114229248,262400> >::`RTTI Base Class Array' = <no type information>
004d8dfc HYTeris!ATL::CWindowImpl<CTsMutiScoreContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Array' = <no type information>
004d8dec HYTeris!ATL::CWindowImpl<CTsMutiScoreContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Class Hierarchy Descriptor' = <no type information>
004e2728 HYTeris!ATL::CWindowImpl<CTsKeyEdit,WTL::CEditT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> > `RTTI Type Descriptor' = <no type information>
004e28c8 HYTeris!ATL::CWindowImpl<CTsNextElementContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> > `RTTI Type Descriptor' = <no type information>
004d8fac HYTeris!ATL::CWindowImpl<CTsButton,WTL::CButtonT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Array' = <no type information>
004d8f9c HYTeris!ATL::CWindowImpl<CTsButton,WTL::CButtonT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::`RTTI Class Hierarchy Descriptor' = <no type information>
004d848c HYTeris!ATL::CWindowImpl<CTsMainControlPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Descriptor at (0,-1,0,64)' = <no type information>
004d8f80 HYTeris!ATL::CWindowImpl<CTsButton,WTL::CButtonT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Descriptor at (0,-1,0,64)' = <no type information>
004d8158 HYTeris!ATL::CWindowImpl<CTsGameMainWnd,ATL::CWindow,ATL::CWinTraits<114229248,262400> >::`RTTI Base Class Descriptor at (0,-1,0,64)' = <no type information>
004d8540 HYTeris!ATL::CWindowImpl<CTsMainStatusPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Descriptor at (0,-1,0,64)' = <no type information>
004d7944 HYTeris!ATL::CWindowImpl<CTsAgentWindow,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Descriptor at (0,-1,0,64)' = <no type information>
004d7f84 HYTeris!ATL::CWindowImpl<CTsDisplayContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Descriptor at (0,-1,0,64)' = <no type information>
004e2aa0 HYTeris!ATL::CWindowImpl<CTsSingleScoreContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> > `RTTI Type Descriptor' = <no type information>
004d9168 HYTeris!ATL::CWindowImpl<CTsSubControlContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Class Hierarchy Descriptor' = <no type information>
004d9178 HYTeris!ATL::CWindowImpl<CTsSubControlContainer,ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Array' = <no type information>
004e1628 HYTeris!ATL::CWindowImpl<CTsAgentWindow,ATL::CWindow,ATL::CWinTraits<1442840576,0> > `RTTI Type Descriptor' = <no type information>
004e2148 HYTeris!ATL::CWindowImpl<CTsMainControlPane,ATL::CWindow,ATL::CWinTraits<1442840576,0> > `RTTI Type Descriptor' = <no type information>
004d95c4 HYTeris!ATL::CWindowImpl<CTsUserListCtrl,WTL::CListViewCtrlT<ATL::CWindow>,ATL::CWinTraitsOR<32777,0,ATL::CWinTraits<1442840576,0> > >::`RTTI Base Class Array' = <no type information>
004d95b4 HYTeris!ATL::CWindowImpl<CTsUserListCtrl,WTL::CListViewCtrlT<ATL::CWindow>,ATL::CWinTraitsOR<32777,0,ATL::CWinTraits<1442840576,0> > >::`RTTI Class Hierarchy Descriptor' = <no type information>
004e3400 HYTeris!ATL::CWindowImpl<CTsUserListCtrl,WTL::CListViewCtrlT<ATL::CWindow>,ATL::CWinTraitsOR<32777,0,ATL::CWinTraits<1442840576,0> > > `RTTI Type Descriptor' = <no type information>
004d9598 HYTeris!ATL::CWindowImpl<CTsUserListCtrl,WTL::CListViewCtrlT<ATL::CWindow>,ATL::CWinTraitsOR<32777,0,ATL::CWinTraits<1442840576,0> > >::`RTTI Base Class Descriptor at (0,-1,0,64)' = <no type information>
上面的符号可以验证我们多份实例的猜想。
可以看到  CWindowImpl和我们的窗口继承类(T),窗口基类(TBase), 窗口风格( TWinTraits ) 相关,所以数量很多 。    那么为什么这么多的符号,也就是这么多的函数代码 ,exe大小没有被撑大?
那时因为 CWindowImpl类 函数本身很小, 我们从函数的 代码量上就可以看出来。

用同样的方法 ,我们可以继续分析  CWindowImplBaseT
template < class  TBase = CWindow,  class  TWinTraits = CControlWinTraits>
class  ATL_NO_VTABLE CWindowImplBaseT :  public  CWindowImplRoot< TBase >
{
public :
    WNDPROC m_pfnSuperWindowProc;

    CWindowImplBaseT() : m_pfnSuperWindowProc(::DefWindowProc)
    {}

     static  DWORD GetWndStyle(DWORD dwStyle)
    {
         return  TWinTraits::GetWndStyle(dwStyle);
    }
     static  DWORD GetWndExStyle(DWORD dwExStyle)
    {
         return  TWinTraits::GetWndExStyle(dwExStyle);
    }

     virtual  WNDPROC GetWindowProc()
    {
         return  WindowProc;
    }
     static  LRESULT CALLBACK StartWindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
     static  LRESULT CALLBACK WindowProc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
    HWND Create(HWND hWndParent, _U_RECT rect, LPCTSTR szWindowName,
            DWORD dwStyle, DWORD dwExStyle, _U_MENUorID MenuOrID, ATOM atom, LPVOID lpCreateParam = NULL);
    BOOL DestroyWindow()
    {
        ATLASSERT(::IsWindow(m_hWnd));
         return  ::DestroyWindow(m_hWnd);
    }
    BOOL SubclassWindow(HWND hWnd);
    HWND UnsubclassWindow(BOOL bForce = FALSE);

    LRESULT DefWindowProc()
    {
         const  _ATL_MSG* pMsg = m_pCurrentMsg;
        LRESULT lRes = 0;
         if  (pMsg != NULL)
            lRes = DefWindowProc(pMsg->message, pMsg->wParam, pMsg->lParam);
         return  lRes;
    }

    LRESULT DefWindowProc(UINT uMsg, WPARAM wParam, LPARAM lParam)
    {
#ifdef STRICT
         return  ::CallWindowProc(m_pfnSuperWindowProc, m_hWnd, uMsg, wParam, lParam);
#else
         return  ::CallWindowProc((FARPROC)m_pfnSuperWindowProc, m_hWnd, uMsg, wParam, lParam);
#endif
    }

     virtual  void  OnFinalMessage(HWND  /* hWnd */ )
    {
         //  override to do something, if needed
    }
};

0:000> x HYTeris!ATL::CWindowImplBaseT<*
0040f170 HYTeris!ATL::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<1442840576,0> >::Create ( struct  HWND__ *,  class  ATL::_U_RECT, wchar_t *, unsigned  long , unsigned  long class  ATL::_U_MENUorID, unsigned  short void  *)
0040ec20 HYTeris!ATL::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<1442840576,0> >::GetWndStyle (unsigned  long )
00435970 HYTeris!ATL::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<114229248,262400> >::OnFinalMessage ( struct  HWND__ *)
004604d0 HYTeris!ATL::CWindowImplBaseT<WTL::CListViewCtrlT<ATL::CWindow>,ATL::CWinTraitsOR<32777,0,ATL::CWinTraits<1442840576,0> > >::GetWndStyle (unsigned  long )
00434a10 HYTeris!ATL::CWindowImplBaseT<WTL::CEditT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::~CWindowImplBaseT<WTL::CEditT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> > ( void )
0040ec60 HYTeris!ATL::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<1442840576,0> >::GetWndExStyle (unsigned  long )
00461740 HYTeris!ATL::CWindowImplBaseT<WTL::CListViewCtrlT<ATL::CWindow>,ATL::CWinTraitsOR<32777,0,ATL::CWinTraits<1442840576,0> > >::WindowProc ( struct  HWND__ *, unsigned  int , unsigned  int long )
0044c040 HYTeris!ATL::CWindowImplBaseT<WTL::CEditT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::WindowProc ( struct  HWND__ *, unsigned  int , unsigned  int long )
004346e0 HYTeris!ATL::CWindowImplBaseT<WTL::CButtonT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::~CWindowImplBaseT<WTL::CButtonT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> > ( void )
0041c440 HYTeris!ATL::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<1442840576,0> >::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<1442840576,0> > ( void )
00435940 HYTeris!ATL::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<114229248,262400> >::GetWindowProc ( void )
00459580 HYTeris!ATL::CWindowImplBaseT<WTL::CButtonT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::GetWndExStyle (unsigned  long )
00461950 HYTeris!ATL::CWindowImplBaseT<WTL::CListViewCtrlT<ATL::CWindow>,ATL::CWinTraitsOR<32777,0,ATL::CWinTraits<1442840576,0> > >::Create ( struct  HWND__ *,  class  ATL::_U_RECT, wchar_t *, unsigned  long , unsigned  long class  ATL::_U_MENUorID, unsigned  short void  *)
004395b0 HYTeris!ATL::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<114229248,262400> >::StartWindowProc ( struct  HWND__ *, unsigned  int , unsigned  int long )
00439ea0 HYTeris!ATL::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<114229248,262400> >::DefWindowProcW (unsigned  int , unsigned  int long )
00461620 HYTeris!ATL::CWindowImplBaseT<WTL::CListViewCtrlT<ATL::CWindow>,ATL::CWinTraitsOR<32777,0,ATL::CWinTraits<1442840576,0> > >::StartWindowProc ( struct  HWND__ *, unsigned  int , unsigned  int long )
004596e0 HYTeris!ATL::CWindowImplBaseT<WTL::CButtonT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::Create ( struct  HWND__ *,  class  ATL::_U_RECT, wchar_t *, unsigned  long , unsigned  long class  ATL::_U_MENUorID, unsigned  short void  *)
0041ced0 HYTeris!ATL::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<1442840576,0> >::WindowProc ( struct  HWND__ *, unsigned  int , unsigned  int long )
0044c370 HYTeris!ATL::CWindowImplBaseT<WTL::CEditT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::UnsubclassWindow ( int )
00460510 HYTeris!ATL::CWindowImplBaseT<WTL::CListViewCtrlT<ATL::CWindow>,ATL::CWinTraitsOR<32777,0,ATL::CWinTraits<1442840576,0> > >::GetWndExStyle (unsigned  long )
00457f70 HYTeris!ATL::CWindowImplBaseT<WTL::CButtonT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::WindowProc ( struct  HWND__ *, unsigned  int , unsigned  int long )
0045f830 HYTeris!ATL::CWindowImplBaseT<WTL::CListViewCtrlT<ATL::CWindow>,ATL::CWinTraitsOR<32777,0,ATL::CWinTraits<1442840576,0> > >::GetWindowProc ( void )
00457820 HYTeris!ATL::CWindowImplBaseT<WTL::CButtonT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::CWindowImplBaseT<WTL::CButtonT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> > ( void )
004374b0 HYTeris!ATL::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<114229248,262400> >::GetWndExStyle (unsigned  long )
00434ad0 HYTeris!ATL::CWindowImplBaseT<WTL::CListViewCtrlT<ATL::CWindow>,ATL::CWinTraitsOR<32777,0,ATL::CWinTraits<1442840576,0> > >::~CWindowImplBaseT<WTL::CListViewCtrlT<ATL::CWindow>,ATL::CWinTraitsOR<32777,0,ATL::CWinTraits<1442840576,0> > > ( void )
004595c0 HYTeris!ATL::CWindowImplBaseT<WTL::CButtonT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::StartWindowProc ( struct  HWND__ *, unsigned  int , unsigned  int long )
004358f0 HYTeris!ATL::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<114229248,262400> >::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<114229248,262400> > ( void )
00445920 HYTeris!ATL::CWindowImplBaseT<WTL::CEditT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::OnFinalMessage ( struct  HWND__ *)
00461ad0 HYTeris!ATL::CWindowImplBaseT<WTL::CListViewCtrlT<ATL::CWindow>,ATL::CWinTraitsOR<32777,0,ATL::CWinTraits<1442840576,0> > >::DefWindowProcW (unsigned  int , unsigned  int long )
0041c4c0 HYTeris!ATL::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<1442840576,0> >::OnFinalMessage ( struct  HWND__ *)
00437470 HYTeris!ATL::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<114229248,262400> >::GetWndStyle (unsigned  long )
004398e0 HYTeris!ATL::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<114229248,262400> >::Create ( struct  HWND__ *,  class  ATL::_U_RECT, wchar_t *, unsigned  long , unsigned  long class  ATL::_U_MENUorID, unsigned  short void  *)
0040ed50 HYTeris!ATL::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<1442840576,0> >::StartWindowProc ( struct  HWND__ *, unsigned  int , unsigned  int long )
004458a0 HYTeris!ATL::CWindowImplBaseT<WTL::CEditT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::CWindowImplBaseT<WTL::CEditT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> > ( void )
0045f7e0 HYTeris!ATL::CWindowImplBaseT<WTL::CListViewCtrlT<ATL::CWindow>,ATL::CWinTraitsOR<32777,0,ATL::CWinTraits<1442840576,0> > >::CWindowImplBaseT<WTL::CListViewCtrlT<ATL::CWindow>,ATL::CWinTraitsOR<32777,0,ATL::CWinTraits<1442840576,0> > > ( void )
0041ad30 HYTeris!ATL::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<1442840576,0> >::~CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<1442840576,0> > ( void )
00430550 HYTeris!ATL::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<114229248,262400> >::~CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<114229248,262400> > ( void )
0045f860 HYTeris!ATL::CWindowImplBaseT<WTL::CListViewCtrlT<ATL::CWindow>,ATL::CWinTraitsOR<32777,0,ATL::CWinTraits<1442840576,0> > >::OnFinalMessage ( struct  HWND__ *)
004582a0 HYTeris!ATL::CWindowImplBaseT<WTL::CButtonT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::UnsubclassWindow ( int )
0041c490 HYTeris!ATL::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<1442840576,0> >::GetWindowProc ( void )
0044cb50 HYTeris!ATL::CWindowImplBaseT<WTL::CEditT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::DefWindowProcW (unsigned  int , unsigned  int long )
0044c250 HYTeris!ATL::CWindowImplBaseT<WTL::CEditT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::SubclassWindow ( struct  HWND__ *)
004458f0 HYTeris!ATL::CWindowImplBaseT<WTL::CEditT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::GetWindowProc ( void )
00459540 HYTeris!ATL::CWindowImplBaseT<WTL::CButtonT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::GetWndStyle (unsigned  long )
00458180 HYTeris!ATL::CWindowImplBaseT<WTL::CButtonT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::SubclassWindow ( struct  HWND__ *)
00457870 HYTeris!ATL::CWindowImplBaseT<WTL::CButtonT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::GetWindowProc ( void )
00457910 HYTeris!ATL::CWindowImplBaseT<WTL::CButtonT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::OnFinalMessage ( struct  HWND__ *)
0040e990 HYTeris!ATL::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<1442840576,0> >::DestroyWindow ( void )
004396d0 HYTeris!ATL::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<114229248,262400> >::WindowProc ( struct  HWND__ *, unsigned  int , unsigned  int long )
0041d1c0 HYTeris!ATL::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<1442840576,0> >::DefWindowProcW (unsigned  int , unsigned  int long )
004578a0 HYTeris!ATL::CWindowImplBaseT<WTL::CButtonT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::DefWindowProcW (unsigned  int , unsigned  int long )
004d8fc8 HYTeris!ATL::CWindowImplBaseT<WTL::CButtonT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Descriptor at (0,-1,0,64)' = <no type information>
004d8ff4 HYTeris!ATL::CWindowImplBaseT<WTL::CButtonT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Array' = <no type information>
004d8fe4 HYTeris!ATL::CWindowImplBaseT<WTL::CButtonT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::`RTTI Class Hierarchy Descriptor' = <no type information>
004d79b4 HYTeris!ATL::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Array' = <no type information>
004d79a4 HYTeris!ATL::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Class Hierarchy Descriptor' = <no type information>
004e2798 HYTeris!ATL::CWindowImplBaseT<WTL::CEditT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> > `RTTI Type Descriptor' = <no type information>
004d819c HYTeris!ATL::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<114229248,262400> >::`RTTI Base Class Descriptor at (0,-1,0,64)' = <no type information>
004d8938 HYTeris!ATL::CWindowImplBaseT<WTL::CEditT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Array' = <no type information>
004d8928 HYTeris!ATL::CWindowImplBaseT<WTL::CEditT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::`RTTI Class Hierarchy Descriptor' = <no type information>
004d960c HYTeris!ATL::CWindowImplBaseT<WTL::CListViewCtrlT<ATL::CWindow>,ATL::CWinTraitsOR<32777,0,ATL::CWinTraits<1442840576,0> > >::`RTTI Base Class Array' = <no type information>
004d95fc HYTeris!ATL::CWindowImplBaseT<WTL::CListViewCtrlT<ATL::CWindow>,ATL::CWinTraitsOR<32777,0,ATL::CWinTraits<1442840576,0> > >::`RTTI Class Hierarchy Descriptor' = <no type information>
004e2ee8 HYTeris!ATL::CWindowImplBaseT<WTL::CButtonT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> > `RTTI Type Descriptor' = <no type information>
004d81c8 HYTeris!ATL::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<114229248,262400> >::`RTTI Base Class Array' = <no type information>
004d81b8 HYTeris!ATL::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<114229248,262400> >::`RTTI Class Hierarchy Descriptor' = <no type information>
004e34a0 HYTeris!ATL::CWindowImplBaseT<WTL::CListViewCtrlT<ATL::CWindow>,ATL::CWinTraitsOR<32777,0,ATL::CWinTraits<1442840576,0> > > `RTTI Type Descriptor' = <no type information>
004d95e0 HYTeris!ATL::CWindowImplBaseT<WTL::CListViewCtrlT<ATL::CWindow>,ATL::CWinTraitsOR<32777,0,ATL::CWinTraits<1442840576,0> > >::`RTTI Base Class Descriptor at (0,-1,0,64)' = <no type information>
004e1f68 HYTeris!ATL::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<114229248,262400> > `RTTI Type Descriptor' = <no type information>
004e1688 HYTeris!ATL::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<1442840576,0> > `RTTI Type Descriptor' = <no type information>
004d7988 HYTeris!ATL::CWindowImplBaseT<ATL::CWindow,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Descriptor at (0,-1,0,64)' = <no type information>
004d890c HYTeris!ATL::CWindowImplBaseT<WTL::CEditT<ATL::CWindow>,ATL::CWinTraits<1442840576,0> >::`RTTI Base Class Descriptor at (0,-1,0,64)' = <no type information>
可以看到 CWindowImplBaseT只与 窗口基类和窗口风格相关 ,数量 已经减小很多 ,CWindowImplBaseT模板类本身函数数量不多 ,函数代码量大小也不大 。 

然后再看CWindowImplRoot,
template < class  TBase  /*  = CWindow  */ >
class  ATL_NO_VTABLE CWindowImplRoot :  public  TBase,  public  CMessageMap
{
public :
    CWndProcThunk m_thunk;
     const  _ATL_MSG* m_pCurrentMsg;
    DWORD m_dwState;

     enum  { WINSTATE_DESTROYED = 0x00000001 };

//  Constructor/destructor
    CWindowImplRoot() : m_pCurrentMsg(NULL), m_dwState(0)
    { }

     virtual  ~CWindowImplRoot()
    {
#ifdef _DEBUG
         if (m_hWnd != NULL)     //  should be cleared in WindowProc
        {
            ATLTRACE(atlTraceWindowing, 0, _T("ERROR - Object deleted before window was destroyed\n"));
            ATLASSERT(FALSE);
        }
#endif  // _DEBUG
    }

//  Current message
     const  _ATL_MSG* GetCurrentMessage()  const
    {
         return  m_pCurrentMsg;
    }

     //  "handled" management for cracked handlers
    BOOL IsMsgHandled()  const
    {
         const  _ATL_MSG* pMsg = GetCurrentMessage();
        ATLASSERT(pMsg != NULL);
        ATLASSERT(pMsg->cbSize >=  sizeof (_ATL_MSG));
         return  pMsg->bHandled;
    }
     void  SetMsgHandled(BOOL bHandled)
    {
        _ATL_MSG* pMsg = (_ATL_MSG*)GetCurrentMessage();     //  override const
        ATLASSERT(pMsg != NULL);
        ATLASSERT(pMsg->cbSize >=  sizeof (_ATL_MSG));
        pMsg->bHandled = bHandled;
    }

//  Message forwarding and reflection support
    LRESULT ForwardNotifications(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
    LRESULT ReflectNotifications(UINT uMsg, WPARAM wParam, LPARAM lParam, BOOL& bHandled);
     static  BOOL DefaultReflectionHandler(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam, LRESULT& lResult);
};

0:000> x HYTeris!ATL::CWindowImplRoot*
004364d0 HYTeris!ATL::CWindowImplRoot<WTL::CListViewCtrlT<ATL::CWindow> >::~CWindowImplRoot<WTL::CListViewCtrlT<ATL::CWindow> > ( void )
004367d0 HYTeris!ATL::CWindowImplRoot<WTL::CEditT<ATL::CWindow> >::~CWindowImplRoot<WTL::CEditT<ATL::CWindow> > ( void )
00457c30 HYTeris!ATL::CWindowImplRoot<WTL::CButtonT<ATL::CWindow> >::CWindowImplRoot<WTL::CButtonT<ATL::CWindow> > ( void )
00460550 HYTeris!ATL::CWindowImplRoot<WTL::CListViewCtrlT<ATL::CWindow> >::CWindowImplRoot<WTL::CListViewCtrlT<ATL::CWindow> > ( void )
004479d0 HYTeris!ATL::CWindowImplRoot<WTL::CEditT<ATL::CWindow> >::CWindowImplRoot<WTL::CEditT<ATL::CWindow> > ( void )
0041c360 HYTeris!ATL::CWindowImplRoot<ATL::CWindow>::~CWindowImplRoot<ATL::CWindow> ( void )
00435f40 HYTeris!ATL::CWindowImplRoot<WTL::CButtonT<ATL::CWindow> >::~CWindowImplRoot<WTL::CButtonT<ATL::CWindow> > ( void )
004613f0 HYTeris!ATL::CWindowImplRoot<ATL::CWindow>::ForwardNotifications (unsigned  int , unsigned  int long int  *)
00438f50 HYTeris!ATL::CWindowImplRoot<ATL::CWindow>::ReflectNotifications (unsigned  int , unsigned  int long int  *)
0041c8e0 HYTeris!ATL::CWindowImplRoot<ATL::CWindow>::CWindowImplRoot<ATL::CWindow> ( void )
004e2800 HYTeris!ATL::CWindowImplRoot<WTL::CEditT<ATL::CWindow> > `RTTI Type Descriptor' = <no type information>
004d897c HYTeris!ATL::CWindowImplRoot<WTL::CEditT<ATL::CWindow> >::`RTTI Base Class Array' = <no type information>
004d896c HYTeris!ATL::CWindowImplRoot<WTL::CEditT<ATL::CWindow> >::`RTTI Class Hierarchy Descriptor' = <no type information>
004d9640 HYTeris!ATL::CWindowImplRoot<WTL::CListViewCtrlT<ATL::CWindow> >::`RTTI Class Hierarchy Descriptor' = <no type information>
004d9650 HYTeris!ATL::CWindowImplRoot<WTL::CListViewCtrlT<ATL::CWindow> >::`RTTI Base Class Array' = <no type information>
004d8950 HYTeris!ATL::CWindowImplRoot<WTL::CEditT<ATL::CWindow> >::`RTTI Base Class Descriptor at (0,-1,0,64)' = <no type information>
004d9028 HYTeris!ATL::CWindowImplRoot<WTL::CButtonT<ATL::CWindow> >::`RTTI Class Hierarchy Descriptor' = <no type information>
004d9038 HYTeris!ATL::CWindowImplRoot<WTL::CButtonT<ATL::CWindow> >::`RTTI Base Class Array' = <no type information>
004e16dc HYTeris!ATL::CWindowImplRoot<ATL::CWindow> `RTTI Type Descriptor' = <no type information>
004e3530 HYTeris!ATL::CWindowImplRoot<WTL::CListViewCtrlT<ATL::CWindow> > `RTTI Type Descriptor' = <no type information>
004d9624 HYTeris!ATL::CWindowImplRoot<WTL::CListViewCtrlT<ATL::CWindow> >::`RTTI Base Class Descriptor at (0,-1,0,64)' = <no type information>
004d79c8 HYTeris!ATL::CWindowImplRoot<ATL::CWindow>::`RTTI Base Class Descriptor at (0,-1,0,64)' = <no type information>
004e2f58 HYTeris!ATL::CWindowImplRoot<WTL::CButtonT<ATL::CWindow> > `RTTI Type Descriptor' = <no type information>
004d79f4 HYTeris!ATL::CWindowImplRoot<ATL::CWindow>::`RTTI Base Class Array' = <no type information>
004d79e4 HYTeris!ATL::CWindowImplRoot<ATL::CWindow>::`RTTI Class Hierarchy Descriptor' = <no type information>
004d900c HYTeris!ATL::CWindowImplRoot<WTL::CButtonT<ATL::CWindow> >::`RTTI Base Class Descriptor at (0,-1,0,64)' = <no type information>
可以看到 CWindowImplRoot只和窗口基类(CWindow)相关 ,所以 相关的符号就更少了。

最后我们再看一下CWindow:
0:000> x HYTeris!ATL::CWindow::*
004e1000 HYTeris!ATL::CWindow::rcDefault =  struct  tagRECT
00442a20 HYTeris!ATL::CWindow::DestroyWindow ( void )
00425730 HYTeris!ATL::CWindow::InvalidateRect ( struct  tagRECT *,  int )
00442340 HYTeris!ATL::CWindow::CenterWindow ( struct  HWND__ *)
00425850 HYTeris!ATL::CWindow::UpdateWindow ( void )
0041c950 HYTeris!ATL::CWindow::CWindow ( struct  HWND__ *)
004391e0 HYTeris!ATL::CWindow::GetDlgItem ( int )
004568a0 HYTeris!ATL::CWindow::SetWindowRgn ( struct  HRGN__ *,  int )
00441d20 HYTeris!ATL::CWindow::GetWindowLongW ( int )
00444350 HYTeris!ATL::CWindow::Create (wchar_t *,  struct  HWND__ *,  class  ATL::_U_RECT, wchar_t *, unsigned  long , unsigned  long class  ATL::_U_MENUorID,  void  *)
004391b0 HYTeris!ATL::CWindow:: operator  HWND__ * ( void )
00459080 HYTeris!ATL::CWindow::EnableWindow ( int )
00425140 HYTeris!ATL::CWindow::GetClientRect ( struct  tagRECT *)
00430c70 HYTeris!ATL::CWindow::SetWindowTextW (wchar_t *)
0040eb30 HYTeris!ATL::CWindow::GetWndClassName ( void )
00456770 HYTeris!ATL::CWindow::MoveWindow ( int int int int int )
00442ac0 HYTeris!ATL::CWindow::KillTimer (unsigned  int )
00455fc0 HYTeris!ATL::CWindow::GetWindowTextW (wchar_t *,  int )
0040ba20 HYTeris!ATL::CWindow::IsWindow ( void )
00441db0 HYTeris!ATL::CWindow::GetParent ( void )
004315b0 HYTeris!ATL::CWindow::SetWindowPos ( struct  HWND__ *,  int int int int , unsigned  int )
00456810 HYTeris!ATL::CWindow::GetWindowRect ( struct  tagRECT *)
00431860 HYTeris!ATL::CWindow::GetStyle ( void )
00455250 HYTeris!ATL::CWindow::Invalidate ( int )
004318f0 HYTeris!ATL::CWindow::SetCapture ( void )
00442cf0 HYTeris!ATL::CWindow::SetTimer (unsigned  int , unsigned  int , <function> *)
00431980 HYTeris!ATL::CWindow::ModifyStyle (unsigned  long , unsigned  long , unsigned  int )
00443d10 HYTeris!ATL::CWindow::GetDlgItemTextW ( int , wchar_t *,  int )
0040b980 HYTeris!ATL::CWindow::SendMessageW (unsigned  int , unsigned  int long )
00434be0 HYTeris!ATL::CWindow::ShowWindow ( int )
004d7a38 HYTeris!ATL::CWindow::`RTTI Base Class Descriptor at (0,-1,0,64)' = <no type information>
004d7a04 HYTeris!ATL::CWindow::`RTTI Base Class Descriptor at (4,-1,0,64)' = <no type information>
004d7a20 HYTeris!ATL::CWindow::`RTTI Class Hierarchy Descriptor' = <no type information>
004d7a30 HYTeris!ATL::CWindow::`RTTI Base Class Array' = <no type information>
我们看到CWindow只有一份 , 并且函数数量相比AtlWin.h减少了很多,因为ATL是以源代码的方式提供的 ,所有没有用到的函数不会被编译到我们最终的可执行文件中 。

通过上面的分析 ,相信我们知道了为什么ATL/WTL大量使用模板,但是生成的exe还是这么小的原因 :
不是模板不会使代码膨胀,而是ATL/WTL在设计时就关注了这个问题 ,它避免了在可能生成很多模板实例的模板类中编写大量代码(有些拗口,不知道你有没有读懂^_^)

总结下 ,如果你想用模板,但是又不想 让自己最终的可执行文件变的很大, 有2种方式:
(1)你的模板类不会生成很多模板实例,这样写成模板类还有意义吗?
(2)你的模板类的代码量或是函数个数很少,你可以仿照ATL的方式把模板无关的东西逐层剥离。

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