LRESULT WINAPI WndProc(HWND hWnd,UINT msg,WPARAM wParam,LPARAM lParam)

 {

     PAINTSTRUCT ps;

     switch (msg)

     {

     case WM_PAINT:

         {

             BeginPaint(hWnd,&ps);

             EndPaint(hWnd,&ps);

             return ;

         }

     case WM_DESTROY:

         {

             PostQuitMessage();

             return ;

         }

     }

     return DefWindowProc(hWnd,msg,wParam,lParam);

 }

 void initWndClass(HINSTANCE hInstance,WNDCLASSEX &wndClass)

 {

     wndClass.cbSize = sizeof(WNDCLASSEX);

     wndClass.style = CS_HREDRAW | CS_VREDRAW;

     wndClass.lpfnWndProc = WndProc;

     wndClass.cbClsExtra = ;

     wndClass.cbWndExtra = ;

     wndClass.hInstance = hInstance;

     wndClass.hIcon = LoadIcon(NULL,IDI_APPLICATION);

     wndClass.hCursor = LoadCursor(NULL,IDC_ARROW);

     wndClass.hbrBackground = (HBRUSH)GetStockObject(GRAY_BRUSH);

     wndClass.lpszClassName = TEXT(CLASSNAME);

     wndClass.lpszMenuName = NULL;

     wndClass.hIconSm = LoadIcon(NULL,IDI_WINLOGO);

 }

 int WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nShowCmd)

 {

     HWND hWnd;

     WNDCLASSEX wndClass;

     initWndClass(hInstance,wndClass);

     RegisterClassEx(&wndClass);

     hWnd = CreateWindow(

         TEXT(CLASSNAME),

         TEXT(APPNAME),

         WS_OVERLAPPEDWINDOW,

         CW_USEDEFAULT,

         CW_USEDEFAULT,

         SCREEN_W,

         SCREEN_H,

         NULL,

         NULL,

         hInstance,

         NULL

         );

     if (NULL == hWnd)

     {

         MessageBox(NULL,TEXT("NULL == hWnd"),NULL,MB_OK);

         return ;

     }

     UpdateWindow(hWnd);

     ShowWindow(hWnd,nShowCmd);

     MSG msg;

     while (true)

     {

         if ( PeekMessage(&msg,NULL,,,PM_REMOVE) )

         {

             if (WM_QUIT == msg.message)

             {

                 break;

             }

             TranslateMessage(&msg);

             DispatchMessage(&msg);

         }

         else

         {

             Render();

         }

     }

     Release();

     return msg.lParam;

 }