Whatafuck先生(WinMain)

#include <windows.h>
#include <stdio.h>

LRESULT CALLBACK WinSunProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam);
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd)
{
	//设计一个窗口类
	WNDCLASS wndcls;
	wndcls.cbClsExtra = 0;
	wndcls.cbWndExtra = 0;
	wndcls.hbrBackground = (HBRUSH) GetStockObject(BLACK_BRUSH);
	wndcls.hCursor = LoadCursor(NULL, IDC_CROSS);
	wndcls.hIcon = LoadIcon(NULL, IDI_ERROR);
	wndcls.hInstance = hInstance; //应用程序实例句柄由WinMain函数传进来
	wndcls.lpfnWndProc = WinSunProc;
	wndcls.lpszClassName = "yongjian";
	wndcls.lpszMenuName = NULL;
	wndcls.style = CS_HREDRAW | CS_VREDRAW;
	RegisterClass(&wndcls);

	//创建窗口，定义一个变量用来保存成功创建窗口后返回的句柄
	HWND hwnd;
	hwnd = CreateWindow("yongjian", "http://www.baidu.com", WS_OVERLAPPEDWINDOW, 0, 0, 600, 400, NULL, NULL, hInstance, NULL);

	//显示及刷新窗口
	ShowWindow(hwnd, SW_SHOWNORMAL);
	UpdateWindow(hwnd);

	//定义消息结构体，开始消息循环
	MSG msg;
	while (GetMessage(&msg,NULL,0,0))
	{
		TranslateMessage(&msg);
		DispatchMessage(&msg);
	}
	return msg.wParam;
}

//编写窗口过程函数
LRESULT CALLBACK WinSunProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
	switch (uMsg)
	{
	case WM_CHAR:
		char szChar[20];
		sprintf_s(szChar, "char code is %d", wParam);
		MessageBox(hwnd, szChar, "char", 0);
		break;
	case WM_LBUTTONDOWN:
		MessageBox(hwnd, "mouse clicked", "message", 0);
		HDC hdc;
		hdc = GetDC(hwnd);
		TextOut(hdc, 0, 50, "程序员之家", strlen("程序员之家"));
		break;
	case WM_PAINT:
		HDC hDC;
		PAINTSTRUCT ps;
		hDC = BeginPaint(hwnd,&ps);
		TextOut(hDC, 0, 0, "http://www.baidu.com", strlen("http://www.baidu.com"));
		EndPaint(hwnd,&ps);
		break;
	case WM_CLOSE:
		if(IDYES == MessageBox(hwnd, "是否真的结束?", "message", MB_YESNO))
		{
			DestroyWindow(hwnd);
		}
		break;
	case WM_DESTROY:
		PostQuitMessage(0);
		break;
	default:
		return DefWindowProc(hwnd,uMsg,wParam,lParam);
	}
	return 0;
}