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POUsing detours for hooking writing text in notepad
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  1. POUsing detours for hooking writing text in notepad
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    copied!<p>I'm trying to use detours to hook text output for example in notepad.</p> <p>I wrote the following code. I will not put here all code, but the most significant parts.</p> <p>DLL part:</p> <pre><code>DLLEXPORT LRESULT CALLBACK CBTProc(int nCode, WPARAM wParam, LPARAM lParam) { if (nCode &lt; 0) { return CallNextHookEx(0, nCode, wParam, lParam); } if (nCode == HCBT_ACTIVATE) { HWND hWnd = (HWND)wParam; TCHAR szTemp[255]; GetWindowText(hWnd, szTemp, 255); DetourTransactionBegin(); DetourUpdateThread(hWnd); DetourAttach(&amp;(PVOID&amp;)Real_DrawText, Mine_DrawText); DetourTransactionCommit(); DetourTransactionBegin(); DetourUpdateThread(hWnd); DetourAttach(&amp;(PVOID&amp;)Real_DrawTextEx, Mine_DrawTextEx); DetourTransactionCommit(); DetourTransactionBegin(); DetourUpdateThread(hWnd); DetourAttach(&amp;(PVOID&amp;)Real_TextOut, Mine_TextOut); DetourTransactionCommit(); DetourTransactionBegin(); DetourUpdateThread(hWnd); DetourAttach(&amp;(PVOID&amp;)Real_ExtTextOut, Mine_ExtTextOut); DetourTransactionCommit(); } return 0; } </code></pre> <p>Client part:</p> <pre><code>int main(int argc, char* argv[]) { HOOKPROC hkprcSysMsg; static HINSTANCE hinstDLL; static HHOOK hhookSysMsg; hinstDLL = LoadLibrary(TEXT("dllsample.dll")); //cout &lt;&lt; (hinstDLL == NULL); hkprcSysMsg = (HOOKPROC)GetProcAddress(hinstDLL, "_CBTProc@12"); DWORD dw = GetLastError(); //cout &lt;&lt; (hkprcSysMsg == NULL); //cout &lt;&lt; dw; hhookSysMsg = SetWindowsHookEx( WH_CBT, hkprcSysMsg, hinstDLL, 0); //std::cout &lt;&lt; (hhookSysMsg == NULL); int i; std::cin &gt;&gt; i; } </code></pre> <p>The problem is that all 4 functions which draw text are not hooked. What do I do wrong. I'v started studing detours and didn't find answer for my question in docs.</p> <p>If other parts of code are required, I'll put them here later.</p>
 

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