qt钩子屏蔽系统按键、任务管理器、任务栏实例

#include "mainwindow.h" #include "ui_mainwindow.h" #include <QApplication> #include <Windows.h> #include <QDebug> #include <QSettings> //在注册表该目录下增加新内容 #define TASKMANAGER "HKEY_CURRENT_USER\\Software\\Microsoft\\Windows\\CurrentVersion\\Policies\\System" MainWindow::MainWindow(QWidget *parent) : QMainWindow(parent), ui(new Ui::MainWindow) { ui->setupUi(this); } MainWindow::~MainWindow() { delete ui; } /********************************************************** 不用调用dll就可以执行的全局钩子示例: 只留下F12做为程序退出,屏蔽键盘和鼠标,测试时请注意 ********************************************************/ HHOOK keyHook=NULL; HHOOK mouseHook=NULL; //键盘钩子过程 LRESULT CALLBACK keyProc(int nCode,WPARAM wParam,LPARAM lParam ) { //在WH_KEYBOARD_LL模式下lParam 是指向KBDLLHOOKSTRUCT类型地址 KBDLLHOOKSTRUCT *pkbhs = (KBDLLHOOKSTRUCT *) lParam; //如果nCode等于HC_ACTION则处理该消息，如果小于0，则钩子子程就必须将该消息传递给 CallNextHookEx if(nCode == HC_ACTION){ if(pkbhs->vkCode == VK_ESCAPE && GetAsyncKeyState(VK_CONTROL)& 0x8000 && GetAsyncKeyState(VK_SHIFT)&0x8000){ qDebug() << "Ctrl+Shift+Esc"; }else if(pkbhs->vkCode == VK_ESCAPE && GetAsyncKeyState(VK_CONTROL) & 0x8000){ qDebug() << "Ctrl+Esc"; }else if(pkbhs->vkCode == VK_TAB && pkbhs->flags & LLKHF_ALTDOWN){ qDebug() << "Alt+Tab"; }else if(pkbhs->vkCode == VK_ESCAPE && pkbhs->flags &LLKHF_ALTDOWN){ qDebug() << "Alt+Esc"; }else if(pkbhs->vkCode == VK_LWIN || pkbhs->vkCode == VK_RWIN){ qDebug() << "LWIN/RWIN"; }else if(pkbhs->vkCode == VK_F4 && pkbhs->flags & LLKHF_ALTDOWN){ qDebug() << "Alt+F4"; } if(pkbhs->vkCode == VK_F12) { void unHook(); qApp->quit(); } return 1;//返回1表示截取消息不再传递,返回0表示不作处理,消息继续传递 } return CallNextHookEx(keyHook, nCode, wParam, lParam); } //鼠标钩子过程 LRESULT CALLBACK mouseProc(int nCode,WPARAM wParam,LPARAM lParam ) { return 1; } //卸载钩子 void unHook() { UnhookWindowsHookEx(keyHook); // UnhookWindowsHookEx(mouseHook); } //安装钩子,调用该函数即安装钩子 void setHook() { //这两个底层钩子,不要DLL就可以全局 //底层键盘钩子 keyHook =SetWindowsHookEx( WH_KEYBOARD_LL,keyProc,GetModuleHandle(NULL),0); //底层鼠标钩子 // mouseHook =SetWindowsHookEx( WH_MOUSE_LL,mouseProc,GetModuleHandle(NULL),0); } //添加注册评比Ctrl+Alt+del void TaskManager(bool flag) { QSettings *settings = new QSettings(TASKMANAGER, QSettings::NativeFormat); if(flag){ settings->setValue("DisableTaskMgr", "1"); }else{ settings->remove("DisableTaskMgr"); } delete settings; } void MainWindow::on_pushButton_clicked() { //注册 钩子 setHook(); qDebug() << "0000000"; } void MainWindow::on_pushButton_2_clicked() { // 销毁 钩子 unHook(); qDebug() << "33333333"; } void MainWindow::on_pushButton_3_clicked() { TaskManager(true); } void MainWindow::on_pushButton_4_clicked() { TaskManager(false); } void MainWindow::on_pushButton_5_clicked() { if(ui->pushButton_5->text() == QString::fromLocal8Bit("隐藏任务栏")){ task=FindWindow(L"Shell_TrayWnd",NULL); ShowWindow(task,SW_HIDE); ui->pushButton_5->setText(QString::fromLocal8Bit("显示任务栏")); }else{ ShowWindow(task,SW_SHOW); ui->pushButton_5->setText(QString::fromLocal8Bit("隐藏任务栏")); } }