windows编程：第一个windows程序

 #define WIN32_LEAN_AND_MEAN
 #include <windows.h>
 #include <windowsx.h>
 #include <math.h>
 #define WINDOW_CLASS_NAME L"WINCLASS1"
 //窗口处理函数
 LRESULT CALLBACK WindowProc(HWND hwnd,
     UINT msg,
     WPARAM wParam,
     LPARAM lPram)
 {
     PAINTSTRUCT ps;
     HDC hdc;
     switch (msg)
     {
     case WM_CREATE:
     {
                       return ;
     }break;
     case WM_PAINT:
     {
                      hdc = BeginPaint(hwnd, &ps);
                      EndPaint(hwnd, &ps);
                      return ;
     }break;
     default:break;
     }
     return DefWindowProc(hwnd, msg, wParam, lPram);
 }
 void GameMain()
 {
     return;
 }
 int WINAPI WinMain(HINSTANCE hInstance,
     HINSTANCE hPrevInstance,
     LPSTR lpCmdLine,
     int nCmdShow)
 {
     //定义窗口类
     WNDCLASSEX winClass;
     HWND hWnd;
     MSG msg;
     //填充窗口类的个成员
     winClass.cbSize = sizeof(WNDCLASSEX);
     winClass.style = CS_DBLCLKS | CS_OWNDC | CS_HREDRAW | CS_VREDRAW;
     winClass.lpfnWndProc = WindowProc;    //窗口消息处理函数
     winClass.cbClsExtra = ;
     winClass.cbWndExtra = ;
     winClass.hInstance = hInstance;
     winClass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
     winClass.hCursor = LoadCursor(NULL, IDC_ARROW);
     winClass.hbrBackground = (HBRUSH)GetStockObject(BLACK_BRUSH);
     winClass.lpszMenuName = NULL;
     winClass.lpszClassName = WINDOW_CLASS_NAME;        //窗口类名
     winClass.hIconSm = LoadIcon(NULL, IDI_APPLICATION);

     //注册窗口类
     if (!RegisterClassEx(&winClass))
     {
         return ;
     }

     //创建窗口类的一个成员
     if (!(hWnd = CreateWindowEx(NULL,
         WINDOW_CLASS_NAME,
         L"hello world",
         WS_OVERLAPPEDWINDOW | WS_VISIBLE,
         , ,
         , ,
         NULL,
         NULL,
         hInstance,
         NULL)))
     {
         return ;
     }

     //消息循环
     while (true)
     {
         if (PeekMessage(&msg, hWnd, , , PM_REMOVE))
         {
             if (msg.message == WM_QUIT)
             {
                 break;
             }
             TranslateMessage(&msg);
             DispatchMessage(&msg);
         }
         GameMain();
     }
     return msg.wParam;
 }