C++windows内核编程笔记day03_day04_day05-阿里云开发者社区

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C++windows内核编程笔记day03_day04_day05

简介: windows消息机制、消息格式和消息处理1 unicode支持,windows下用: 1、先在#include上面,定义 UNICODE #define UNICODE 2、定义字符串 TCHAR * ptxt=TEXT("学习hel...

windows消息机制、消息格式和消息处理1

unicode支持,windows下用:
1、先在#include<windows.h>上面,定义 UNICODE
#define UNICODE
2、定义字符串
TCHAR * ptxt=TEXT("学习hello c++");
3、根据需要,打印不同格式字符串
#ifdef UNICODE
    wprintf(L"%s\n",ptxt);
#else
    printf("%s\n",ptxt);
#endif

打印UNICODE WriteConsole API函数:
HANDLE hstd=GetStdHandle(STD_OUTPUT_HANDLE);
wchar_t tc=300;
WriteConsole(hstd,&tc,1,NULL,NULL);


day66 am over
//winpro中,处理点击关闭时,返回0,退出消息循环(退出程序)
    switch(msg)
    {
    case WM_DESTROY:
        PostQuitMessage(0);
        break;
    }
//窗口类缓冲区大小,基于一个窗口类创建出来的所有窗口共享的缓冲区
wce.cbClsExtra=0;//数据是4的整数倍,一般200
//写入数据:
DWORD SetClassLong(  HWND hWnd,       // handle to window
  int nIndex,      // 字节索引
  LONG dwNewLong   // new value
  );
 //读取数据
 DWORD GetClassLong(  HWND hWnd,  // handle to window
  int nIndex  // 字节索引
  );
  //窗口缓冲区大小,某一个窗口的数据缓冲区
      wce.cbWndExtra=0;
    //写入数据
    LONG SetWindowLong(  HWND hWnd,       // handle to window
  int nIndex,      // 字节索引
  LONG dwNewLong   // new value
  );
  //获取数据
  LONG GetWindowLong(  HWND hWnd,  // handle to window
  int nIndex  //字节索引
  );
//系统消息格式
  typedef struct tagMSG {
  HWND   hwnd;
  UINT   message;
  WPARAM wParam;
  LPARAM lParam;
  DWORD  time;
  POINT  pt;
} MSG, *PMSG;

//在创建窗口之后还未显示的时候
    case WM_CREATE:
        OnCreate(hwnd,lparam);
void OnCreate(HWND hwnd,LPARAM lparam)
{
    CREATESTRUCT *pcs=(CREATESTRUCT*)lparam;
    //对应CreateWindowEx的12个参数
    char * txt=(char *)pcs->lpCreateParams;//最后的附加参数
    MessageBox(NULL,txt,"info",MB_OK);
}


day66 pm over
void OnSizeChange(HWND hwnd,LPARAM lparam)
{
    int w=LOWORD(lparam);
    int h=HIWORD(lparam);
    HWND he=GetDlgItem(hwnd,1001);
    MoveWindow(he,0,0,w,h);
}
//窗口大小变化时产生消息
    case WM_SIZE:
        OnSizeChange(hwnd,lparam)
        break;
//windows发送消息
SendMessage//发送消息,等待消息返回
PostMessage//发送消息,不等待消息返回
    PostMessage(hwnd,WM_QUIT,0,0);//发送退出消息
用户自定义消息定义(可用31743个),如下:
#define WM_MYMSG WM_USER+1
#define WM_MYMSG2 WM_USER+2

case WM_PAINT://窗口重新绘制
        OnPaint(hwnd);
        break;
case WM_LBUTTONDOWN://点击鼠标左键,
        InvalidateRect(hwnd,NULL,NULL);//窗口重绘
        break;
//窗口绘图
void OnPaint(HWND hwnd)
{
    WriteConsole(g_houtput,"wm_paint\n",9,NULL,NULL);
    PAINTSTRUCT ps={0};
    HDC hdc=BeginPaint(hwnd,&ps);//必须在WM_PAINT消息处理函数中使用
    TextOut(hdc,200,200,"hello",5);//绘制字符串到界面
    EndPaint(hwnd,&ps);
}

键盘消息:
    case WM_KEYDOWN://键盘按键消息
        OnKeydown(hwnd,wparam);
        break;
void OnKeydown(HWND hwnd,WPARAM wparam)
{
    char txt[200]={0};
    sprintf(txt,"wm_keydown:%08X,%d\n",wparam,wparam);//虚拟键码
    WriteConsole(g_houtput,txt,strlen(txt),NULL,NULL);
    switch(wparam)
    {
    case VK_UP:
        g_ypos-=10;
        if(g_ypos<0) g_ypos=0;
        break;
    case VK_DOWN:
        g_ypos+=10;
        break;
    case VK_LEFT:
        g_xpos-=10;
        if(g_xpos<0) g_xpos=0;
        break;
    case VK_RIGHT:
        g_xpos+=10;
        break;
    }
    InvalidateRect(hwnd,NULL,TRUE);//重新绘制窗口
}
case WM_CHAR://translateMessage发送的,只有可见字符才能触发
    on_char(hwnd,wparam,lparam);
void on_char(HWND hwnd,WPARAM wparam,LPARAM lparam)
{
    char txt[200]={0};
    sprintf(txt,"char code %08X,%d\n",wparam,wparam);//ascii码
    WriteConsole(g_houtput,txt,strlen(txt),NULL,NULL);
}

鼠标消息:函数参数大致相同,查看MSDN Library就知道了。
    case WM_LBUTTONDOWN://点击鼠标左键,
    case WM_LBUTTONUP:
    case WM_RBUTTONDOWN:
    case WM_RBUTTONUP:
    case WM_MOUSEMOVE:
    case WM_LBUTTONDBLCLK://在注册窗口风格中要加 CS_DBLCLKS
    case WM_RBUTTONDBLCLK:
    case WM_MOUSEWHEEL:
    case WM_MOUSELEAVE:

如:
    case WM_LBUTTONUP://点击鼠标左键,
        onLbuttondown(hwnd,wparam,lparam);
        break;
void onLbuttondown(HWND hwnd,WPARAM wparam,LPARAM lparam)
{
    char txt[200]={0};
    if(wparam&MK_LBUTTON==MK_LBUTTON) wparam=wparam-MK_LBUTTON;//排除本身
    if(wparam&MK_SHIFT==MK_SHIFT) {}//shift键按下
    if(wparam&MK_RBUTTON==MK_RBUTTON) {}//右键按下
    sprintf(txt,"其他键:%08X,x=%d,y=%d\n",wparam,LOWORD(lparam),HIWORD(lparam));//可见字符的ascii码
    WriteConsole(g_houtput,txt,strlen(txt),NULL,NULL);
}
        case WM_MOUSEMOVE://鼠标移动
            OnMouseMove(hwnd,lparam);
            break;
void OnMouseMove(HWND hwnd,LPARAM lparam)
{
    char txt[200]={0};
    sprintf(txt,"mouse move:x=%d,y=%d\n",LOWORD(lparam),HIWORD(lparam));//可见字符的ascii码
    WriteConsole(g_houtput,txt,strlen(txt),NULL,NULL);
}
//鼠标双击的触发顺序:单击down,单击up,双击down,单击up
//在.h文件中加定义指定系统最低版本:
#define _WIN32_WINNT 0X400

        case WM_MOUSEWHEEL://鼠标滚轮
            OnMouseWheel(hwnd,wparam);
            break;
void OnMouseWheel(HWND hwnd,WPARAM wparam){
    short npy=HIWORD(wparam);//滚轮移动的偏移量
    char txt[200]={0};
    sprintf(txt,"OnMouseWheel:x=%d\n",npy);
    WriteConsole(g_houtput,txt,strlen(txt),NULL,NULL);
}

定时器消息WM_TIMER://不太精确
UINT setTimer(HWND hwnd,UINT id)
{
    SetTimer(hwnd,id,1000,timer1);//可以在这里直接指定处理函数
    //SetTimer(hwnd,id,1000,NULL);//在WM_TIMER中捕捉再处理
    return id;
}
//直接指定的处理函数
void CALLBACK  timer1(HWND hwnd,UINT umsg,UINT uid,DWORD dwtime)
{
    char txt[200]={0};
    sprintf(txt,"timer1:id=%d\n",uid);
    WriteConsole(g_houtput,txt,strlen(txt),NULL,NULL);
}

day68 pm 96
//在WM_TIMER中捕捉再处理
    case WM_TIMER:
        timer1Proc(hwnd,msg,wparam,lparam);
        break;
LRESULT CALLBACK timer1Proc(
                            HWND hwnd,       // handle to window
                            UINT uMsg,       // WM_TIMER
                            WPARAM wParam,   // timer identifier
                            LPARAM lParam    // timer callback (TIMERPROC)
)
{
    char txt[200]={0};
    sprintf(txt,"timer1:id=%d\n",wParam);
    WriteConsole(g_houtput,txt,strlen(txt),NULL,NULL);
    return 0;
}
    RECT rc={0};
    GetClientRect(hwnd,&rc);//获取窗口边界
    //画圆
    RECT g_rc={0};
    PAINTSTRUCT ps={0};
    HDC hdc=BeginPaint(hwnd,&ps);//必须在WM_PAINT消息处理函数中使用
    //TextOut(hdc,g_xpos,g_ypos,"hello",5);//绘制字符串到界面
    Ellipse(hdc,g_rc.left,g_rc.top,g_rc.right,g_rc.bottom);
    EndPaint(hwnd,&ps);


代码示例:

和day01一样,建立程序 ,

修改stdafx.h ,  加一行: #define _WIN32_WINNT 0X400

修改主要cpp文件:

// win4.cpp : Defines the entry point for the application.
//

#include "stdafx.h"
#include <stdio.h>
HINSTANCE g_hinstance=0;//全局句柄
HANDLE g_houtput=0;
HWND g_edit=0;
int g_xpos=100;
int g_ypos=100;
#define WM_MYMSG WM_USER+1

UINT setTimer(HWND hwnd,UINT id)
{
	SetTimer(hwnd,id,1000,NULL);//可以在这里指定处理函数,也可以在WM_TIMER中捕捉再处理
	return id;
}
void SetExtra(HWND hwnd)
{
	SetClassLong(hwnd,0,301);
	SetWindowLong(hwnd,0,401);
}
void GetExtra(HWND hwnd)
{
	long nc= GetClassLong(hwnd,0);
	long nw=GetWindowLong(hwnd,0);
	char txt[200]={0};
	sprintf(txt,"%d,%d",nc,nw);
	MessageBox(NULL,txt,"info",MB_OK);
}
void OnCreate(HWND hwnd,LPARAM lparam)
{
	//g_edit=CreateWindowEx(0,"edit","hello",WS_CHILD|WS_VISIBLE|WS_BORDER,0,0,
	//	200,200,hwnd,NULL,g_hinstance,NULL);
	SendMessage(hwnd,WM_MYMSG,1,2);
	setTimer(hwnd,1023);
	//PostMessage(hwnd,WM_MYMSG,1,2);
}
void OnSizeChange(HWND hwnd,LPARAM lparam)
{
	int width=LOWORD(lparam);
	int height=HIWORD(lparam);
	//改变窗口大小时,同时改编辑框大小
	//MoveWindow(g_edit,0,0,width,height,TRUE);
	CHAR txt[40]={0};
	sprintf(txt,"%d,%d\n",width,height);
	WriteConsole(g_houtput,txt,strlen(txt),NULL,NULL);
}
//窗口绘图
void OnPaint(HWND hwnd)
{
	WriteConsole(g_houtput,"wm_paint\n",9,NULL,NULL);
	PAINTSTRUCT ps={0};
	HDC hdc=BeginPaint(hwnd,&ps);//必须在WM_PAINT消息处理函数中使用
	TextOut(hdc,g_xpos,g_ypos,"hello",5);//绘制字符串到界面
	EndPaint(hwnd,&ps);
}
void OnKeydown(HWND hwnd,WPARAM wparam)
{
	//WriteConsole(g_houtput,"wm_keydown\n",11,NULL,NULL);
	bool ischange=false;
	switch(wparam)
	{
	case VK_UP:
		g_ypos-=10;
		if(g_ypos<0) g_ypos=0;
		ischange=true;
		break;
	case VK_DOWN:
		g_ypos+=10;
		ischange=true;
		break;
	case VK_LEFT:
		g_xpos-=10;
		if(g_xpos<0) g_xpos=0;
		ischange=true;
		break;
	case VK_RIGHT:
		g_xpos+=10;
		ischange=true;
		break;
	}
	if(ischange) InvalidateRect(hwnd,NULL,TRUE);
}
void OnKeyup(HWND hwnd,WPARAM wparam)
{
	char txt[200]={0};
	sprintf(txt,"VIRTUAL KEY:%08X,%d\n",wparam,wparam);//虚拟键码
	WriteConsole(g_houtput,txt,strlen(txt),NULL,NULL);
}
void on_char(HWND hwnd,WPARAM wparam,LPARAM lparam)
{
	char txt[200]={0};
	sprintf(txt,"char code %08X,%d\n",wparam,wparam);//可见字符的ascii码
	WriteConsole(g_houtput,txt,strlen(txt),NULL,NULL);
}
void onLbuttondown(HWND hwnd,WPARAM wparam,LPARAM lparam)
{
	char txt[200]={0};
	if(wparam&MK_LBUTTON==MK_LBUTTON) wparam=wparam-MK_LBUTTON;//排除本身
	if(wparam&MK_SHIFT==MK_SHIFT) {}//shift键按下
	if(wparam&MK_RBUTTON==MK_RBUTTON) {}//右键按下
	sprintf(txt,"onLbuttondown:其他键:%08X,x=%d,y=%d\n",wparam,LOWORD(lparam),HIWORD(lparam));//可见字符的ascii码
	WriteConsole(g_houtput,txt,strlen(txt),NULL,NULL);
}
void OnMouseMove(HWND hwnd,LPARAM lparam)
{
	char txt[200]={0};
	g_xpos=LOWORD(lparam);
	g_ypos=HIWORD(lparam);
	sprintf(txt,"mouse move:x=%d,y=%d\n",g_xpos,g_ypos);//可见字符的ascii码
	WriteConsole(g_houtput,txt,strlen(txt),NULL,NULL);
	InvalidateRect(hwnd,NULL,TRUE);
}
void OnLbuttonDBClk(HWND hwnd)
{
	char txt[200]={0};
	sprintf(txt,"OnLbuttonDBClk\n");
	WriteConsole(g_houtput,txt,strlen(txt),NULL,NULL);
}
void OnMouseWheel(HWND hwnd,WPARAM wparam){
	short npy=HIWORD(wparam);//滚轮移动的偏移量
	char txt[200]={0};
	sprintf(txt,"OnMouseWheel:x=%d\n",npy);
	WriteConsole(g_houtput,txt,strlen(txt),NULL,NULL);
}
void CALLBACK  timer1(HWND hwnd,UINT umsg,UINT uid,DWORD dwtime)
{
	char txt[200]={0};
	sprintf(txt,"timer1:id=%d\n",uid);
	WriteConsole(g_houtput,txt,strlen(txt),NULL,NULL);
}
LRESULT CALLBACK timer1Proc(
							HWND hwnd,       // handle to window
							UINT uMsg,       // WM_TIMER
							WPARAM wParam,   // timer identifier
							LPARAM lParam    // timer callback (TIMERPROC)
)
{
	char txt[200]={0};
	sprintf(txt,"timer1:id=%d\n",wParam);
	WriteConsole(g_houtput,txt,strlen(txt),NULL,NULL);
	return 0;
}

//回调函数
LRESULT CALLBACK WinProc(HWND hwnd,UINT msg,WPARAM wparam,LPARAM lparam)
{
	switch(msg)
	{
	case WM_SYSCOMMAND:
		if(wparam==SC_CLOSE){
			int ret=MessageBox(NULL,"是否退出","info",MB_YESNO);
			if(ret==IDYES){
				//下面代码会自动关闭和销毁
				//PostQuitMessage(0);
			}
			else return 0;//不执行下面代码
		}
		break;
//窗口大小变化时产生消息
	case WM_SIZE:
		OnSizeChange(hwnd,lparam);
		break;
	case WM_CREATE:
		OnCreate(hwnd,lparam);
		break;
	case WM_DESTROY:
		//PostQuitMessage(0);
		PostMessage(hwnd,WM_QUIT,0,0);
		break;
	case WM_MYMSG://处理自定义消息
		WriteConsole(g_houtput,"wm_mymsg\n",9,NULL,NULL);
		break;
	case WM_PAINT://窗口重新绘制
			OnPaint(hwnd);
			break;
	case WM_LBUTTONDOWN://点击鼠标左键,
		onLbuttondown(hwnd,wparam,lparam);
		break;
	case WM_LBUTTONUP://点击鼠标左键,
		onLbuttondown(hwnd,wparam,lparam);
		break;
		case WM_RBUTTONDOWN:
		case WM_RBUTTONUP:
			break;
		case WM_MOUSEMOVE:
			//OnMouseMove(hwnd,lparam);
			break;
		case WM_MOUSEWHEEL://鼠标滚轮
			OnMouseWheel(hwnd,wparam);
			break;
		case WM_LBUTTONDBLCLK://在注册窗口风格中要加 CS_DBLCLKS
			OnLbuttonDBClk(hwnd);
			break;
		case WM_RBUTTONDBLCLK:
		
		//InvalidateRect(hwnd,NULL,NULL);//窗口重绘
		break;
	case WM_KEYDOWN://键盘按键消息
		OnKeydown(hwnd,wparam);
		break;
	case WM_KEYUP://键盘按键消息
		OnKeyup(hwnd,wparam);
		break;
	case WM_TIMER:
		timer1Proc(hwnd,msg,wparam,lparam);
		break;
	case WM_CHAR://translateMessage发送的,只有可见字符才能触发
		//on_char(hwnd,wparam,lparam);
		break;;
	}
	return DefWindowProc(hwnd,msg,wparam,lparam);
}
//注册窗口类
BOOL Register(LPSTR lpClassName,WNDPROC wndproc)
{
	WNDCLASSEX wce={0};
	wce.cbSize=sizeof(wce);
	wce.cbClsExtra=200;
	wce.cbWndExtra=200;
	wce.hbrBackground=(HBRUSH)(COLOR_WINDOW+1);
	wce.hCursor=NULL;
	wce.hIcon=NULL;
	wce.hIconSm=NULL;
	wce.hInstance=g_hinstance;
	wce.lpfnWndProc=wndproc;
	wce.lpszClassName=lpClassName;
	wce.lpszMenuName=NULL;
	wce.style=CS_HREDRAW|CS_VREDRAW|CS_DBLCLKS;
	ATOM atom= RegisterClassEx(&wce);
	if(atom==0){
		MessageBox(NULL,"注册失败","info",MB_OK);
		return FALSE;
	}
	return TRUE;
}
//创建窗口
HWND CreateMain(LPSTR lpClassName,LPSTR lpWndName)
{
	HWND hwnd=CreateWindowEx(0,lpClassName,lpWndName,WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,CW_USEDEFAULT,
		CW_USEDEFAULT,CW_USEDEFAULT,NULL,NULL,g_hinstance,"hello create");
	return hwnd;
}
//创建子窗口
HWND CreateChild(HWND phwnd,LPSTR lpClassName,LPSTR lpWndName)
{
	if(Register(lpClassName,DefWindowProc)==0)
	{
		MessageBox(phwnd,"创建子窗口失败","info",MB_OK);
		return NULL;
	}
	//子窗口风格,都要 WS_CHILD|WS_VISIBLE
	HWND hwnd=CreateWindowEx(0,lpClassName,lpWndName,WS_CHILD|WS_VISIBLE|WS_OVERLAPPEDWINDOW,CW_USEDEFAULT,CW_USEDEFAULT,
		200,200,phwnd,NULL,g_hinstance,NULL);
	return hwnd;
}
//显示窗口
void Display(HWND hwnd)
{
	ShowWindow(hwnd,SW_SHOW);
	UpdateWindow(hwnd);
}
//处理消息
void MSGdeal()
{
 	MSG msg={0};
	while(GetMessage(&msg,NULL,0,0)){
		TranslateMessage(&msg);//翻译消息 
		DispatchMessage(&msg);//派发给 WinProc 处理消息 
	}
// 	while(1)
// 	{
// 		if(PeekMessage(&msg,NULL,0,0,PM_NOREMOVE))//有消息
// 		{
// 			if(!GetMessage(&msg,NULL,0,0)) return;
// 			else
// 			{
// 				TranslateMessage(&msg);//翻译消息,只翻译可见字符
// 				DispatchMessage(&msg);//派发给 WinProc 处理消息 
// 			}
// 		}
// 		else//无消息
// 		{
// 			//WriteConsole(g_houtput,"nomsg\n",6,NULL,NULL);
// 			//Sleep(1);
// 		}
// 	}
}

int APIENTRY WinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPSTR     lpCmdLine,
                     int       nCmdShow)
{
	AllocConsole();//调试程序方法
	g_houtput=GetStdHandle(STD_OUTPUT_HANDLE);
	g_hinstance=hInstance;
 	// TODO: Place code here.
	//SysReg();
	//AppReg();
	if(Register("main",WinProc)==0)
	{
		MessageBox(NULL,"注册失败","提示",MB_OK);
		return 0;
	}
	HWND hwnd= CreateMain("main","pro1");
	Display(hwnd);

// 	HWND hchild=CreateChild(hwnd,"child1","child1");//创建子窗口
// 	HWND hchild2=CreateChild(hwnd,"child2","child2");
// 	
// 	MoveWindow(hchild,300,200,200,200,TRUE);
// 	MoveWindow(hchild2,500,200,200,200,TRUE);
// 	SetExtra(hchild);
// 	GetExtra(hchild2);
	MSGdeal();
	return 0;
}









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