#include<windows.h> // 编写Windows程序必须包含的头文件

LRESULT CALLBACK WndProc(HWND,UINT,WPARAM,LPARAM); // 声明窗口函数原型

int WINAPI WinMain(HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nShowCmd)
{
HWND hwnd; // 定义窗口句柄
MSG msg; // 定义一个用来存储消息的变量
TCHAR lpszClassName[] = TEXT("窗口");

WNDCLASS wc; // 定义一个窗口类变量
wc.style = CS_HREDRAW | CS_VREDRAW;
wc.lpfnWndProc = WndProc;
wc.cbClsExtra = 0;
wc.cbWndExtra = 0;
wc.hInstance = hInstance;
wc.hIcon = ::LoadIcon(NULL,IDI_APPLICATION);
wc.hCursor = ::LoadCursor(NULL,IDC_ARROW);
wc.hbrBackground = (HBRUSH)::GetStockObject(WHITE_BRUSH);
wc.lpszMenuName = NULL;
wc.lpszClassName = lpszClassName;

::RegisterClass(&wc); // 注册窗口

hwnd= CreateWindow(lpszClassName, // 创建窗口
TEXT("Windows"),
WS_OVERLAPPEDWINDOW,
120,50,800,600,
NULL,
NULL,
hInstance,
NULL);

::ShowWindow(hwnd,SW_SHOWNORMAL); // 显示窗口
::UpdateWindow(hwnd);

while(::GetMessage(&msg,NULL,0,0)) // 消息循环
{
::TranslateMessage(&msg);
::DispatchMessage(&msg);
}
return msg.wParam;
}

// 处理消息的窗口函数
LRESULT CALLBACK WndProc(HWND hwnd,
UINT message,
WPARAM wParam,
LPARAM lParam)
{
switch(message)
{
case WM_LBUTTONDOWN: // 鼠标左键下消息
{
::MessageBeep(0); // 可以发出声音的API函数
}
break;
case WM_DESTROY:
::PostQuitMessage(0);
break;
default:
return ::DefWindowProc(hwnd,message,wParam,lParam);
}
return 0;
}