QT全局钩子监控鼠标和键盘

2023-10-05 12:53| 来源: 网络整理| 查看: 265

文章目录 1、前言2、全局钩子DLL3、发送鼠标键盘消息4、QT窗口接收信息5、调用DLL钩子

1、前言

想要在窗口失去焦点的情况下获取鼠标和键盘消息，需要用到钩子技术，API函数为：SetWindowsHookEx()。而且必须是全局钩子，全局钩子需要使用DLL注入。即首先生成一个带有全局钩子的DLL，DLL获取鼠标位置和键盘按键消息再发送给QT主程序。

2、全局钩子DLL // myHookMouseAndKeybord.cpp : 定义 DLL 应用程序的导出函数。 // #include #include "stdafx.h" //HINSTANCE g_hInstance; HHOOK g_hMouseHook; HHOOK g_hKeybordHook; HWND g_hMainWND; //安装鼠标钩子（要生成lib文件需要加上extern "C" __declspec(dllexport) ） extern "C" __declspec(dllexport) BOOL InstallMouseHook(HWND hWnd); //卸载鼠标钩子 extern "C" __declspec(dllexport) BOOL UnInstallMouseHook(); //安装键盘钩子 extern "C" __declspec(dllexport) BOOL InstallKeybordHook(); //卸载键盘钩子 extern "C" __declspec(dllexport) BOOL UnInstallKeybordHook(); //鼠标钩子处理函数声明 LRESULT CALLBACK MouseProc(int nCode, WPARAM wParam, LPARAM lParam); //键盘钩子处理函数声明 LRESULT CALLBACK keyBordProc(int nCode, WPARAM wParam, LPARAM lParam); //安装鼠标钩子 BOOL InstallMouseHook(HWND hWnd) { g_hMouseHook = SetWindowsHookEx(WH_MOUSE_LL, MouseProc, GetModuleHandle(L"myHookMouseAndKeybord"), 0); g_hMainWND = hWnd; if (g_hMouseHook != NULL) { return TRUE; } else { return FALSE; } } //卸载鼠标钩子 BOOL UnInstallMouseHook() { return UnhookWindowsHookEx(g_hMouseHook); } //安装键盘钩子 BOOL InstallKeybordHook() { g_hKeybordHook = SetWindowsHookEx(WH_KEYBOARD_LL, keyBordProc, GetModuleHandle(L"myHookMouseAndKeybord"), 0); if (g_hKeybordHook != NULL) { return TRUE; } else { return FALSE; } } //卸载键盘钩子 BOOL UnInstallKeybordHook() { return UnhookWindowsHookEx(g_hKeybordHook); } //鼠标钩子处理函数 LRESULT CALLBACK MouseProc(int nCode, WPARAM wParam, LPARAM lParam) { if (wParam == WM_RBUTTONDOWN) //当鼠标点击右键时发送信息给QT主窗口 { MOUSEHOOKSTRUCT *mhookstruct; //鼠标HOOK结构体 mhookstruct = (MOUSEHOOKSTRUCT*)lParam; POINT pt = mhookstruct->pt; //将当前鼠标坐标点的x，y坐标作为参数向主程序窗口发送消息 PostMessage(g_hMainWND, WM_RBUTTONDOWN, MK_CONTROL, MAKELPARAM(pt.x, pt.y)); } return CallNextHookEx(g_hMouseHook, nCode, wParam, lParam); } //键盘钩子处理函数 LRESULT CALLBACK keyBordProc(int nCode, WPARAM wParam, LPARAM lParam) { if (wParam == WM_KEYDOWN) { tagKBDLLHOOKSTRUCT *keyhookstruct; //键盘HOOK结构体 keyhookstruct = (tagKBDLLHOOKSTRUCT*)lParam; PostMessage(g_hMainWND, WM_KEYDOWN, keyhookstruct->vkCode, keyhookstruct->scanCode); } return CallNextHookEx(g_hKeybordHook, nCode, wParam, lParam); } 3、发送鼠标键盘消息

上面代码已经贴出来了，就在钩子处理函数中。鼠标发送的是位置信息，键盘发送的是键码

4、QT窗口接收信息

QT要接收消息，需要在QApplication中安装QAbstractNativeEventFilter，

#include "LOLdesk.h" #include #include #include class MyAppNativeEventFilter : public QAbstractNativeEventFilter { virtual bool nativeEventFilter(const QByteArray &eventType, void *message, long *longMsg) override { if (eventType == "windows_generic_MSG" || eventType == "windows_dispatcher_MSG") { MSG* pMsg = reinterpret_cast(message); if (pMsg->message == WM_RBUTTONDOWN) { POINT pt = pMsg->pt; qDebug() QApplication a(argc, argv); LOLdesk w; MyAppNativeEventFilter filter; a.installNativeEventFilter(&filter); //在APP上安装EventFilter w.show(); return a.exec(); } 5、调用DLL钩子 //链接lib文件 #pragma comment(lib, "myHookMouseAndKeybord.lib") //安装鼠标钩子声明 extern "C" __declspec(dllimport) BOOL InstallMouseHook(HWND hWnd); //卸载鼠标钩子声明 extern "C" __declspec(dllimport) BOOL UnInstallMouseHook(); //安装键盘钩子 extern "C" __declspec(dllimport) BOOL InstallKeybordHook(); //卸载键盘钩子 extern "C" __declspec(dllimport) BOOL UnInstallKeybordHook(); //安装钩子 BOOL LOLdesk::installHook() { HMODULE hDll = NULL; HWND m_hWnd = (HWND)this->winId(); BOOL hookMouseState = InstallMouseHook(m_hWnd); BOOL hookKeybordState = InstallKeybordHook(); if (!hookMouseState && !hookKeybordState) { qDebug() BOOL hookMouseState = UnInstallMouseHook(); BOOL hookKeybordState = UnInstallKeybordHook(); if (!hookMouseState && !hookKeybordState) { qDebug()

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