MFC中的问题记录 2012220

1. 模态窗体的实现
   
   

   bool CWindowWnd::ShowModal()
   {
      ASSERT(::IsWindow(m_hWnd));
      
      HWND hWndParent = GetWindowOwner(m_hWnd);
      ::ShowWindow(m_hWnd, SW_SHOWNORMAL);
      ::EnableWindow(hWndParent, FALSE);
      MSG msg = { 0 };
      while( ::IsWindow(m_hWnd) && ::GetMessage(&msg, NULL, 0, 0) ) {
         if( msg.message == WM_CLOSE ) {
            ::EnableWindow(hWndParent, TRUE);
            ::SetFocus(hWndParent);
         }
         if( !CPaintManagerUI::TranslateMessage(&msg) ) {
            ::TranslateMessage(&msg);
            ::DispatchMessage(&msg);
         }
         if( msg.message == WM_QUIT ) break;
      }
      ::EnableWindow(hWndParent, TRUE);
      ::SetFocus(hWndParent);
      if( msg.message == WM_QUIT ) ::PostQuitMessage(msg.wParam);
      return true;
   }
   

   
   
   
2. 谈谈父窗口和所有者窗口
3. WM_NCCREATE
4. GWLP_USERDATA
   Sets the user data associated with the window. This data is intended for use by the application that created the window. Its value is initially zero.
5. 《C++设计新思维》读书笔记