初始化windows窗口

 1 LRESULT WINAPI WndProc(HWND hWnd,UINT msg,WPARAM wParam,LPARAM lParam)
 2 {
 3     PAINTSTRUCT ps;
 4     switch (msg)
 5     {
 6     case WM_PAINT:
 7         {
 8             BeginPaint(hWnd,&ps);
 9             EndPaint(hWnd,&ps);
10             return 0;
11         }
12     case WM_DESTROY:
13         {
14             PostQuitMessage(0);
15             return 0;
16         }
17     }
18 
19     return DefWindowProc(hWnd,msg,wParam,lParam);
20 }
21 void initWndClass(HINSTANCE hInstance,WNDCLASSEX &wndClass)
22 {
23     wndClass.cbSize = sizeof(WNDCLASSEX);
24     wndClass.style = CS_HREDRAW | CS_VREDRAW;
25     wndClass.lpfnWndProc = WndProc;
26     wndClass.cbClsExtra = 0;
27     wndClass.cbWndExtra = 0;
28     wndClass.hInstance = hInstance;
29     wndClass.hIcon = LoadIcon(NULL,IDI_APPLICATION);
30     wndClass.hCursor = LoadCursor(NULL,IDC_ARROW);
31     wndClass.hbrBackground = (HBRUSH)GetStockObject(GRAY_BRUSH);
32     wndClass.lpszClassName = TEXT(CLASSNAME);
33     wndClass.lpszMenuName = NULL;
34     wndClass.hIconSm = LoadIcon(NULL,IDI_WINLOGO);
35 }

 1 int WinMain(HINSTANCE hInstance,HINSTANCE hPrevInstance,LPSTR lpCmdLine,int nShowCmd)
 2 {
 3     HWND hWnd;
 4 
 5     WNDCLASSEX wndClass;
 6     initWndClass(hInstance,wndClass);
 7 
 8     RegisterClassEx(&wndClass);
 9 
10     hWnd = CreateWindow(
11         TEXT(CLASSNAME),
12         TEXT(APPNAME),
13         WS_OVERLAPPEDWINDOW,
14         CW_USEDEFAULT,
15         CW_USEDEFAULT,
16         SCREEN_W,
17         SCREEN_H,
18         NULL,
19         NULL,
20         hInstance,
21         NULL
22         );
23 
24     if (NULL == hWnd)
25     {
26         MessageBox(NULL,TEXT("NULL == hWnd"),NULL,MB_OK);
27         return 0;
28     }
29 
30     UpdateWindow(hWnd);
31     ShowWindow(hWnd,nShowCmd); 
32     MSG msg;
33     while (true)
34     {
35         if ( PeekMessage(&msg,NULL,0,0,PM_REMOVE) )
36         {
37             if (WM_QUIT == msg.message)
38             {
39                 break;
40             }
41             TranslateMessage(&msg);
42             DispatchMessage(&msg);
43         }
44         else 
45         {
46             Render();
47         }
48     }
49     Release();
50     return msg.lParam;
51 }