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win32相关（消息Hook）

article 2025/8/18 6:17:42

消息Hook

要想实现消息Hook需要使用到三个相关的Api

SetWindowsHookEx // 设置钩子
CallNextHookEx // 将钩子信息传递到当前钩子链中的下一个子程序
UnhookWindowsHookEx // 卸载钩子

我们编写的消息钩子需要将设置钩子的函数写到dll里面，当钩住一个线程后，产生消息时，如果系统发现包含的钩子dll不在当前进程中，系统就会将这个钩子dll强行加载进去，这也算是一种注入的手段

HHOOK SetWindowsHookExW([in] int       idHook,		// 要Hook的消类型[in] HOOKPROC  lpfn,			// 对应要Hook的消息类型的回调函数[in] HINSTANCE hmod,			// 当前dll的实例句柄[in] DWORD     dwThreadId		// 要Hook的线程id（如果为0则表示挂钩所有线程消息）
);

主要功能dll部分

// hookdll.h#pragma one#include<iostream>
#include<Windows.h>extern "C" _declspec(dllexport) BOOL __stdcall unInstallHook();extern "C" _declspec(dllexport) BOOL __stdcall InstallHook();===============================================================
// hookdll.cpp#include "hookdll.h"HINSTANCE g_hDllInstance = NULL;
HHOOK g_hKeyBoarHook = NULL;// 键盘钩子
LRESULT CALLBACK KeyboardProc(int code, WPARAM wParam, LPARAM lParam) {if (code == HC_ACTION) {BYTE KeyState[256]  = { 0 };// GetKeyboardState 用于获取所有虚拟键的当前状态（按下或释放）if (GetKeyboardState(KeyState)) {LONG keyInfo = lParam;// 获取键值UINT keyCode = (keyInfo >> 16) & 0x00ff;WCHAR wkeyCode = 0;// 转换为Ascii字符ToAscii((UINT)wParam,keyCode,KeyState,(LPWORD)&wkeyCode,NULL); CHAR strInfo[24] = { 0 };sprintf_s(strInfo,_countof(strInfo),"[消息Hook][按键：%c]",wkeyCode);OutputDebugStringA(strInfo);return 0;}}// 把钩子传递给下一个钩子return CallNextHookEx(g_hKeyBoarHook, code, wParam, lParam);}// 卸载钩子
BOOL unInstallHook() {return UnhookWindowsHookEx(g_hKeyBoarHook);
}BOOL InstallHook() {g_hKeyBoarHook = SetWindowsHookEx(WH_KEYBOARD,KeyboardProc, g_hDllInstance,NULL);if (g_hKeyBoarHook) {return TRUE;}return FALSE;
}BOOL DllMain(HINSTANCE hInstance,DWORD dwCallReason,LPVOID lpResverd) {// 当前模块的实例句柄switch (dwCallReason) {case DLL_PROCESS_ATTACH:g_hDllInstance = hInstance;break;}return TRUE;
}

调用程序编写

#include<windows.h>
#include<iostream>// 定义函数指针
typedef BOOL(*installHook)();
typedef BOOL(*unInstallHook)();int main() {HMODULE hModule = LoadLibraryW(L"消息Hook.dll");installHook myInstallHook = (installHook)GetProcAddress(hModule, "InstallHook");unInstallHook myUnInstallHook = (unInstallHook)GetProcAddress(hModule, "unInstallHook");if (myInstallHook()) {printf("Hook成功！");}system("pause");myUnInstallHook();return 0;
}