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#include <windows.h>
#include <stdio.h>
LRESULT CALLBACK WinSunProc(
HWND hwnd, //窗口句柄
UINT uMsg, //消息代码,由TranslateMessage翻译得到
WPARAM wParam, //消息附加参数
LPARAM lParam //消息附加参数
);
int WINAPI WinMain(
HINSTANCE hInstance, //表示该程序当前运行的实例的句柄,这好似一个数值
HINSTANCE hPrevInstance, //表示当前实例的前一个实例的句柄
LPSTR lpCmdLine, //一个以空终止的字符串
int nCmdShow //指定程序的窗口应该如何显示
)
{
//设计一个窗口类
WNDCLASS wndcls;
wndcls.cbClsExtra=0;
wndcls.cbWndExtra=0;
wndcls.hbrBackground=(HBRUSH)GetStockObject(WHITE_BRUSH);
wndcls.hCursor=LoadCursor(NULL,IDC_CROSS);
wndcls.hIcon=LoadIcon(NULL,IDI_INFORMATION);
wndcls.hInstance=hInstance;//应用程序实例句柄由WinMain函数传进来
wndcls.lpfnWndProc=WinSunProc;
wndcls.lpszClassName="Window";
wndcls.lpszMenuName=NULL;
wndcls.style=CS_HREDRAW | CS_VREDRAW;
//注册窗口
RegisterClass(&wndcls);
//创建一个窗口,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("Window","窗口测试",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, //窗口句柄
UINT uMsg, //消息代码,由TranslateMessage翻译得到
WPARAM wParam, //消息附加参数
LPARAM lParam //消息附加参数
)
{
switch(uMsg)
{
case WM_CHAR:
char szChar[20];
sprintf(szChar,"char code is %d",wParam);
MessageBox(hwnd,szChar,"char",0);
break;
case WM_LBUTTONDOWN:
MessageBox(hwnd,"鼠标左击了","提示",0);//弹出消息窗口告诉用户点击了鼠标
HDC hdc;//创建一个DC对象
hdc=GetDC(hwnd);//用hdc保存GetDC函数返回的与特定窗口相关联的DC的句柄
TextOut(hdc,0,20,"Hello World!",strlen("Hello World!"));//在窗口(0,20)的位置处输出一行文字
ReleaseDC(hwnd,hdc);//释放DC所占用的资源,否则会引起内存泄漏
break;
case WM_PAINT:
HDC hDC;
PAINTSTRUCT ps;
hDC=BeginPaint(hwnd,&ps);
TextOut(hDC,0,0,"linsn",strlen("linsn"));
EndPaint(hwnd,&ps);
break;
case WM_CLOSE:
if (IDYES==MessageBox(hwnd,"是否真的结束?","退出提示",MB_YESNO))
{
DestroyWindow(hwnd);
}
break;
case WM_DESTROY:
PostQuitMessage(0);
break;
case WM_RBUTTONDOWN:
HDC hdc1;
hdc1=GetDC(hwnd);
MoveToEx(hdc1,0,50,NULL);
LineTo(hdc1,400,50);
ReleaseDC(hwnd,hdc1);
break;
default:
return DefWindowProc(hwnd,uMsg,wParam,lParam);
}
return 0;
}