本文介绍了为什么挂钩不能用于WH_KEYBOARD之类的高级钩子,虽然它与WH_KEYBOARD_LL一起工作正常,但是我能做些什么来成功实现WH_KEYBOARD钩子呢?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧! 问题描述 29岁程序员,3月因学历无情被辞! 这里是dll的代码 // dllmain.cpp:定义DLL应用程序的入口点。 #include stdafx.h #include dll.h #pragma data_seg(。SHARE) HWND hWndServer = NULL; HHOOK hhook = NULL; #pragma data_seg() #pragma comment(linker,/ section:.SARE, rws) HINSTANCE hinst = NULL; BOOL APIENTRY DllMain(HMODULE hModule, DWORD ul_reason_for_call, LPVOID lpReserved ) { FILE *文件; fopen_s(& file, c:\\Users \\keyur \\\ \\\\\\\\\\ , a +); switch (ul_reason_for_call) { case DLL_PROCESS_ATTACH: fprintf(file, dll attach \\\); break ; case DLL_THREAD_ATTACH: fprintf(file, thread attach \\\); break ; case DLL_THREAD_DETACH: fprintf(file, thread detach \\\); break ; case DLL_PROCESS_DETACH: fprintf(file, dll detach \\\); break ; } return TRUE; } __ declspec ( dllexport )BOOL WINAPI setMyHook(HWND hWnd) { if (hWndServer!= NULL) 返回错误; hhook = SetWindowsHookEx( WH_KEYBOARD, // 这是问题 (HOOKPROC)myhook, hinst, 0 ); if (hhook!= NULL) { / * success * / hWndServer = hWnd; return TRUE; } / * 成功* / 返回错误; } 静态 LRESULT CALLBACK myhook( int ncode,WPARAM wparam,LPARAM lparam) { FILE * file; fopen_s(& file, c:\\Users \\keyur \\\ \\ _doctop \\hook.txt, a +); fprintf(file, keystroked \\\); fclose(档案); return CallNextHookEx(hhook,ncode,wparam,lparam); } 这里是我的cpp文件,请忽略代码中的MyLowLevelHook #include < string.h > #include C:\ Users \keyur \Desktop \keyur \HOOKING\dll\dll\dll.h HHOOK hhook = NULL; HWND hwnd; LRESULT CALLBACK MyLowLevelHook( int nCode,WPARAM wParam,LPARAM lParam) { // GetKeyNameText(lParam,(LPWSTR)缓冲区,20); // _ strlwr(buffer); FILE * file; fopen_s(& file, c:\\Users \\keyur \\\ \\ _doctop \\hook.txt, a +); fprintf(file, keystroked \\\); fclose(档案); return CallNextHookEx(hhook,nCode,wParam,lParam); } int main() { MSG msg; BOOL hook = setMyHook(hwnd); // hhook = SetWindowsHookEx(WH_MOUSE_LL,myhook,NULL,NULL); if (hook == FALSE) { printf( hook为null); getchar(); } while (!GetMessage(& msg,NULL,NULL,NULL)){ TranslateMessage( &安培; MSG); DispatchMessage(& msg); } UnhookWindowsHookEx(hhook); } 解决方案 我的猜测是,原因是你没有窗口你的申请。请参阅KeyboardProc回调文档 KeyboardProc回调 [ ^ ]。 它说只有当应用程序调用GetMessage或PeekMessage时才会调用钩子函数功能,并有一个键盘消息(WM_KEYUP或WM_KEYDOWN)待处理。 在您的情况下,没有窗口,因此没有消息要处理。 相反,低级事件在没有有效消息队列的情况下工作;每当生成键盘事件时它们都会被触发。 分辨率:在主函数中打开一个窗口,让该窗口获得焦点,然后一切都应该正常工作。 here is the code for dll// dllmain.cpp : Defines the entry point for the DLL application.#include "stdafx.h"#include "dll.h"#pragma data_seg(".SHARE")HWND hWndServer = NULL;HHOOK hhook=NULL;#pragma data_seg()#pragma comment("linker, /section:.SHARE,rws")HINSTANCE hinst=NULL;BOOL APIENTRY DllMain( HMODULE hModule, DWORD ul_reason_for_call, LPVOID lpReserved ){FILE *file;fopen_s(&file,"c:\\Users\\keyur\\desktop\\temp.txt","a+");switch (ul_reason_for_call){case DLL_PROCESS_ATTACH:fprintf(file," dll attach \n");break;case DLL_THREAD_ATTACH:fprintf(file," thread attach \n");break;case DLL_THREAD_DETACH:fprintf(file," thread detach \n");break;case DLL_PROCESS_DETACH:fprintf(file," dll detach \n");break;}return TRUE;}__declspec(dllexport) BOOL WINAPI setMyHook(HWND hWnd) { if(hWndServer != NULL) return FALSE; hhook = SetWindowsHookEx( WH_KEYBOARD,//here is the problem (HOOKPROC)myhook, hinst, 0); if(hhook != NULL) { /* success */ hWndServer = hWnd; return TRUE; } /* success */ return FALSE; }static LRESULT CALLBACK myhook(int ncode,WPARAM wparam,LPARAM lparam){FILE *file;fopen_s(&file,"c:\\Users\\keyur\\desktop\\hook.txt","a+");fprintf(file," keystroked \n");fclose(file);return CallNextHookEx(hhook , ncode ,wparam , lparam);}and here is my cpp file , please ignore the MyLowLevelHook in the code#include <string.h>#include "C:\Users\keyur\Desktop\keyur\HOOKING\dll\dll\dll.h"HHOOK hhook = NULL;HWND hwnd ;LRESULT CALLBACK MyLowLevelHook ( int nCode , WPARAM wParam , LPARAM lParam){//GetKeyNameText(lParam,(LPWSTR)buffer,20);//_strlwr(buffer);FILE *file;fopen_s(&file,"c:\\Users\\keyur\\desktop\\hook.txt","a+");fprintf(file," keystroked \n");fclose(file);return CallNextHookEx(hhook, nCode ,wParam , lParam);}int main(){ MSG msg;BOOL hook=setMyHook(hwnd);//hhook = SetWindowsHookEx(WH_MOUSE_LL, myhook , NULL,NULL);if(hook==FALSE){printf("hook is null");getchar();} while(!GetMessage(&msg, NULL, NULL, NULL)) { TranslateMessage(&msg); DispatchMessage(&msg); } UnhookWindowsHookEx(hhook);} 解决方案 My guess would be that the reason is that you don't have a window in your application. See the documentation of KeyboardProc callbackKeyboardProc callback[^].There it says that the hook function is only called "whenever an application calls the GetMessage or PeekMessage function and there is a keyboard message (WM_KEYUP or WM_KEYDOWN) to be processed".In your case there is no window, and hence no message to be processed.In contrast, the low level events work without a valid message queue; they are fired whenever the keyboard event is being generated.Resolution: Open a window in your main function, let that window get the focus and then everything should work fine. 这篇关于为什么挂钩不能用于WH_KEYBOARD之类的高级钩子,虽然它与WH_KEYBOARD_LL一起工作正常,但是我能做些什么来成功实现WH_KEYBOARD钩子呢?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持! 上岸,阿里云!
08-15 22:32