da3326a5e4
Message Hook Window is working and will allow you to see all messages being processed by a target window. Had to build Message Hook Window inside the native MsgHook.dll was having issues keep a java window's WndProc callback processing.
113 lines
3.7 KiB
C++
113 lines
3.7 KiB
C++
/*
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* Copyright 2014, Synthuse.org
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* Released under the Apache Version 2.0 License.
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*
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* last modified by ejakubowski7@gmail.com
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*/
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// MsgHook.cpp : Defines the exported functions for the DLL application.
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//
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#include "stdafx.h"
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LRESULT CALLBACK CwpHookProc(int nCode, WPARAM wParam, LPARAM lParam)
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{
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COPYDATASTRUCT CDS;
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HEVENT Event;
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CDS.dwData = 0;
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CDS.cbData = sizeof(Event);
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CDS.lpData = &Event;
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//if (nCode == HC_ACTION)
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{
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//For WH_CALLWNDPROC hook a pointer to a CWPSTRUCT structure that contains details about the message.
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CWPSTRUCT *cwps = (CWPSTRUCT *)lParam;
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Event.hWnd = cwps->hwnd;
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Event.lParam = cwps->lParam;
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Event.wParam = cwps->wParam;
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Event.nCode = cwps->message;
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Event.dwHookType = WH_CALLWNDPROC;
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memset((void *)&Event.wParamStr, '\0', sizeof(TCHAR) * 25);
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memset((void *)&Event.lParamStr, '\0', sizeof(TCHAR) * 25);
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//if (cwps->message == WM_SETTEXT && cwps->lParam != 0)
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// _tcscpy_s(Event.lParamStr, 25, (const wchar_t*)Event.lParam);
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BOOL bRes = (BOOL)SendMessage(pData->g_hWnd, WM_COPYDATA, 0, (LPARAM)(VOID*)&CDS); // ask the controlling program if the hook should be passed
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}
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return CallNextHookEx(pData->g_CwpHook, nCode, wParam, lParam); // pass hook to next handler
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//return bRes; // Don't tell the other hooks about this message.
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}
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LRESULT CALLBACK MsgHookProc(int nCode, WPARAM wParam, LPARAM lParam)
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{
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COPYDATASTRUCT CDS;
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HEVENT Event;
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CDS.dwData = 0;
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CDS.cbData = sizeof(Event);
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CDS.lpData = &Event;
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//if (nCode == HC_ACTION)
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{
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//For WH_GETMESSAGE hook a pointer to a MSG structure that contains details about the message.
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MSG *msg = (MSG *)lParam;
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Event.hWnd = msg->hwnd;
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Event.lParam = msg->lParam;
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Event.wParam = msg->wParam;
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Event.nCode = msg->message;
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Event.dwHookType = WH_GETMESSAGE;
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memset((void *)&Event.wParamStr, '\0', sizeof(TCHAR) * 25);
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memset((void *)&Event.lParamStr, '\0', sizeof(TCHAR) * 25);
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//if (msg->message == WM_SETTEXT && msg->lParam != 0)
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// _tcscpy_s(Event.lParamStr, 25, (const wchar_t*)Event.lParam);
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//if (msg->message == WM_COMMAND || msg->message == WM_MENUCOMMAND) //infinite loop?
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BOOL bRes = (BOOL)SendMessage(pData->g_hWnd, WM_COPYDATA, 0, (LPARAM)(VOID*)&CDS); // ask the controlling program if the hook should be passed
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}
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return CallNextHookEx(pData->g_MsgHook, nCode, wParam, lParam); // pass hook to next handler
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//return bRes; // Don't tell the other hooks about this message.
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}
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extern "C" __declspec(dllexport) BOOL SetMsgHook(HWND callerHWnd, DWORD threadId)
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{
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if(bStartingProcess) // if we're just starting the DLL for the first time,
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{
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pData->g_hWnd = callerHWnd; // remember the windows and hook handle for further instances
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pData->g_CwpHook = SetWindowsHookEx(WH_CALLWNDPROC, (HOOKPROC)CwpHookProc, (HINSTANCE)pData->g_hInstance, threadId);
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//pData->g_MsgHook = SetWindowsHookEx(WH_GETMESSAGE, (HOOKPROC)MsgHookProc, (HINSTANCE)pData->g_hInstance, threadId);
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if (pData->g_CwpHook == NULL) {
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TCHAR tmp[100];
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_stprintf_s(tmp, _T("Last Error # %ld on threadId %ld"), GetLastError(), threadId);
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MessageBox(0, tmp, _T("Set Hook Error"), 0);
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}
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return (pData->g_CwpHook != NULL); //pData->g_CwpHook != NULL &&
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}
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else
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{
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//MessageBox(0, _T("Error: Not starting process"), _T("Set Hook Error"), 0);
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return false;
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}
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}
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extern "C" __declspec(dllexport) BOOL RemoveHook()
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{
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if (pData == NULL)
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return false;
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if(pData->g_MsgHook) // if the hook is defined
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{
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UnhookWindowsHookEx(pData->g_MsgHook);
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pData->g_MsgHook = NULL;
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}
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if(pData->g_CwpHook) // if the hook is defined
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{
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BOOL ret = UnhookWindowsHookEx(pData->g_CwpHook);
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pData->g_hWnd = NULL; // reset data
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pData->g_CwpHook = NULL;
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return ret;
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}
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return false;
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} |