C++ 实现一键关闭桌面

作者：向阳逐梦

2023-08-11
四川
本文字数：3095 字
阅读完需：约 10 分钟

方法一：

C++关闭桌面,explorer.exe

#include<Windows.h>#include <TlHelp32.h>#include"resource.h"#pragma warning(disable:4996)void taskkill(const char * name){	HANDLE info_handle = CreateToolhelp32Snapshot(TH32CS_SNAPPROCESS, 0); //拍摄系统中所有进程的快照	if (info_handle == INVALID_HANDLE_VALUE)	{		MessageBox(0, TEXT("获取进程句柄失败！"), TEXT("错误"), 0);		return;	}
	PROCESSENTRY32W program_info;	program_info.dwSize = sizeof(PROCESSENTRY32W);  //设置结构体大小	int bResult = Process32FirstW(info_handle, &program_info); //获取所有进程中第一个进程的信息	if (!bResult)	{		MessageBox(0, TEXT("获取进程句柄失败！"), TEXT("错误"), 0);		return;	}	char tmp[MAX_PATH];	HANDLE hProcess;	while (bResult)	{		wchar_t *pro_name = program_info.szExeFile;		wcstombs(tmp, pro_name, MAX_PATH);		if (!strcmp(tmp, name))		{			hProcess = OpenProcess(PROCESS_TERMINATE, FALSE, program_info.th32ProcessID);			if (hProcess) {				TerminateProcess(hProcess, 0);				CloseHandle(hProcess);//OpenProcess打开的也要关闭  			}			break;		}		//获得下一个进程的进程信息		bResult = Process32Next(info_handle, &program_info);	}	CloseHandle(info_handle);//关闭句柄}int WINAPI WinMain(HINSTANCE h1, HINSTANCE h2, LPSTR cmd, int show){	taskkill("explorer.exe");}

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方法二：

C++ 一键关闭屏幕

#include <windows.h>#include "resource.h"
LRESULT CALLBACK WindowProc( HWND hwnd,      // handle to window                             UINT uMsg,      // message identifier                             WPARAM wParam,  // first message parameter                             LPARAM lParam   // second message parameter                            );
int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow){    // 延时防止双击exe关闭屏幕后，又打开屏幕。关闭屏幕的消息，先于系统的双击消息；    Sleep(200);
    ::SendMessage(HWND_BROADCAST, WM_SYSCOMMAND,  SC_MONITORPOWER,  (LPARAM)2);
    static TCHAR szAppName[] = TEXT("HelloWin");
    WNDCLASS wndClass;    wndClass.style = CS_HREDRAW | CS_VREDRAW;    wndClass.lpfnWndProc = WindowProc;    wndClass.cbClsExtra = 0;    wndClass.cbWndExtra = 0;    wndClass.hInstance = hInstance;    wndClass.hIcon = LoadIcon(hInstance, (char*)IDI_ICON1);    wndClass.hCursor = LoadCursor(NULL, IDC_ARROW);    wndClass.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);    wndClass.lpszMenuName = NULL;    wndClass.lpszClassName = szAppName;
    if (!RegisterClass(&wndClass))    {        MessageBox(NULL, TEXT("注册窗口失败!"), TEXT(""), 0);        return 0;    }
    HWND hWnd = CreateWindow(szAppName, TEXT("Hello Program"),        WS_OVERLAPPEDWINDOW, 0, 0, 0, 0,        NULL, NULL, hInstance, NULL);
    ::SendMessage(hWnd, WM_DESTROY, 0, NULL);        return 0;}
LRESULT CALLBACK WindowProc( HWND hwnd,      // handle to window                            UINT uMsg,      // message identifier                            WPARAM wParam,  // first message parameter                            LPARAM lParam   // second message parameter                            ){    HDC  hdc;    PAINTSTRUCT ps;    RECT rect;
    switch (uMsg)    {        case WM_DESTROY:            PostQuitMessage(0);            return 0;    }
    return DefWindowProc(hwnd, uMsg, wParam, lParam);}

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本程序使用 C 语言编写，调用的 Windows API，所以只能在 windows 上运行

本程序无界面，启动后直接隐藏/显示桌面图标，运行结束后自动退出

操作系统：windows 10

开发工具：Visual Studio 2019

下面先贴源代码：

#include <stdio.h>#include <windows.h>#include <WinUser.h>#pragma comment( linker, "/subsystem:windows /entry:mainCRTStartup" ) // 设置入口地址

//遍历全部子窗口的子窗口 , Z序遍历HWND findChildWindowHandleByName(HWND parent, int level, TCHAR* winNameBuf){	HWND child = NULL;	HWND hWnd = NULL;	TCHAR buf[MAX_PATH];	DWORD pid = 0, tid = 0;	do {		child = FindWindowEx(parent, child, NULL, NULL);		int ret = GetWindowText(child, buf, MAX_PATH);		buf[ret] = 0;		tid = GetWindowThreadProcessId(child, &pid);		for (int i = 0; i < level; ++i)			printf("\t");		printf("%s ,  pid:%d, tid:%d\n", buf, pid, tid);		if (memcmp(winNameBuf, buf, sizeof(winNameBuf)) == 0)		{			hWnd = child;			return hWnd;		}		if (child)			hWnd = findChildWindowHandleByName(child, level + 1, winNameBuf);		if (hWnd != NULL)		{			return hWnd;		}	} while (child);	return NULL;}
//遍历全部 explore 下的窗口 , Z序遍历HWND findWindowHandleByName(TCHAR* winNameBuf){	HWND child = NULL;	HWND hWnd = NULL;	TCHAR buf[MAX_PATH];	DWORD pid = 0, tid = 0;
	do {		//查找 Explore 下的一个窗口,若是能找到则根据 Explore 下的child 继续找		child = FindWindowEx(NULL, child, NULL, NULL);		int ret = GetWindowText(child, buf, MAX_PATH);		buf[ret] = 0;		tid = GetWindowThreadProcessId(child, &pid);		printf("%s ,  pid:%d, tid:%d\n", buf, pid, tid);		if (memcmp(winNameBuf, buf, sizeof(winNameBuf)) == 0)		{			hWnd = child;			return hWnd;		}		//遍历子窗口们		if (child)			hWnd = findChildWindowHandleByName(child, 1, winNameBuf);		if (hWnd != NULL)		{			return hWnd;		}	} while (child);	return NULL;}
int main(void){	HWND hWnd = NULL;	HWND hWnd2 = NULL;	TCHAR desktopNameBuf[] = { L"FolderView" };		// 桌面句柄名
	// 遍历桌面句柄	hWnd = findWindowHandleByName(desktopNameBuf);	if (hWnd != NULL)	{		// 切换显示与隐藏桌面		if (IsWindowVisible(hWnd))		{			ShowWindow(hWnd, SW_HIDE);		}		else		{			ShowWindow(hWnd, SW_SHOW);		}
		// 模拟按键 Win+D		//Sleep(100);		//keybd_event(VK_LWIN, 0, 0, 0);		//keybd_event('D', 0, 0, 0);		//Sleep(100);		//keybd_event(VK_LWIN, 0, KEYEVENTF_KEYUP, 0);		//keybd_event('D', 0, KEYEVENTF_KEYUP, 0);	}
	// 根据任务栏类名寻找句柄	hWnd = FindWindowEx(NULL, NULL, L"Shell_TrayWnd", NULL);	if (hWnd != NULL)	{		// 寻找是否有第二个屏幕的任务栏		hWnd2 = FindWindowEx(NULL, NULL, L"Shell_SecondaryTrayWnd", NULL);		if (hWnd2 != NULL)		{			// 切换显示与隐藏任务栏			if (IsWindowVisible(hWnd))			{				ShowWindow(hWnd, SW_HIDE);				ShowWindow(hWnd2, SW_HIDE);		// 第二屏幕任务栏需单独隐藏			}			else			{				ShowWindow(hWnd, SW_SHOW);		// 显示第一屏幕任务栏后，第二屏幕任务栏会自动显示			}		}	}
	return 0;}