第一个WINAPI WinMain程序

#include 

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM); //窗口过程

//窗口初始化（定义窗口的具体方式）
int WINAPI WinMain
(
HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow
)
//int WINAPI WinMain(HINSTANCE hinstance, HINSTANCE hPrevlnst, LPSTR lpsCmdLine, int nCmdShow)
{
	HWND hwnd;
	MSG Msg;
	WNDCLASS wndclass;
	char lpszClassName[] = "窗口";  //窗口类名
	char lpszTitle[] = "My_Windows";  //窗口标题名
	wndclass.style = 0;				//窗口风格
	wndclass.hInstance = hInstance;
	wndclass.lpfnWndProc = WndProc;	//窗口过程函数地址
	wndclass.cbClsExtra = 0;  //窗口类无扩展
	wndclass.cbWndExtra = 0; //窗口实例无扩展
	wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
	wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);  //用箭头光标
	wndclass.hbrBackground = (HBRUSH)(GetStockObject(WHITE_BRUSH));  //窗口背景色为白色
	wndclass.lpszMenuName = NULL;  //窗口无菜单
	wndclass.lpszClassName = lpszClassName; //窗口类名为"窗口"
	if(!RegisterClass(&wndclass))  //如果注册窗口类失败
	{ MessageBeep(0); return FALSE; }
	hwnd = CreateWindow(
		lpszClassName,		 //窗口类名
		lpszTitle,			 //窗口实例的标题名
		WS_OVERLAPPEDWINDOW, //窗口的风格
		CW_USEDEFAULT,
		CW_USEDEFAULT,		 //以上2行表示窗口左上角坐标为默认值
		CW_USEDEFAULT,
		CW_USEDEFAULT,		 //以上2行表示窗口的高度和宽度为默认值
		NULL,				 //此窗口无父窗口
		NULL,				 //此窗口无主菜单
		hInstance,			 //创建此窗口的应用程序的当前句柄（即进程）
		NULL				 //不使用该值
		);
	ShowWindow(hwnd, nCmdShow); //显示窗口
	UpdateWindow(hwnd);			//绘制用户区（刷新用户区）
	while(GetMessage(&Msg, NULL, 0, 0))		//消息循环
	{
		TranslateMessage(&Msg);				//翻译消息
		DispatchMessage(&Msg);				//分发消息
	}
	return Msg.wParam;				//消息循环结束即程序结束将信息返回给系统
}

LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
	switch(message)
	{
	case WM_DESTROY:
		PostQuitMessage(0);
	default:
		return DefWindowProc(hwnd, message, wParam, lParam);
	}
	return 0;
}