遮蔽WebBrowser2控制元件聲音

本機環境 XP SP2 + IE6

專案要求 要禁止WebBrowser2控制元件聲音 不過似乎WebBrowser2沒有提供這樣方便的介面 

網上看到一些是在down完成之後修改原始碼 然後再顯示 這樣在修改的時候把具備音樂的內容去掉

顯然這不是我希望的  最後只有將發聲的api patch掉  難點就是找到對應的api

 

這樣的api大概有

DSound.dll->DirectSoundCreate  mp3發聲

Winmm.dll ->midiStreamOpen     flash 

               ->waveOutWrite         flash等用此發聲

 

所以將DirectSoundCreate  與waveOutWrite        patch

當然如果還有其他發聲的 找到對應的api即可

 

大概函式模型如下  

//遮蔽mp3等聲音 BOOL ForbidMp3Sound() { BOOL bRet = FALSE; HMODULE hDsound = LoadLibrary(_T("DSound.dll")); if (!hDsound) { return bRet; } LPVOID lpDirectSoundCreate = GetProcAddress(hDsound,_T("DirectSoundCreate")); //flash等用此函式 if(!lpDirectSoundCreate) { return bRet; } DWORD NewProtect = PAGE_EXECUTE_READWRITE; DWORD OldProtect; bRet = VirtualProtect(lpDirectSoundCreate,1,NewProtect,&OldProtect); if (!bRet) { FreeLibrary(hDsound); return bRet; } char szBuf[] = { 0xC2, 0x0C, 0x00, 0x48}; MoveMemory (lpDirectSoundCreate,szBuf,3); //恢復 bRet = VirtualProtect(lpDirectSoundCreate,1,OldProtect,&NewProtect); if (!bRet) { FreeLibrary(hDsound); return bRet; } FreeLibrary(hDsound); return bRet; } //遮蔽Flash等聲音 BOOL ForbidFlashSound() { BOOL bRet = FALSE; HMODULE hWinmm = LoadLibrary(_T("winmm.dll")); if (!hWinmm) { return bRet; } LPVOID lpwaveOutWrite = GetProcAddress(hWinmm,_T("waveOutWrite")); //flash等用此函式 if(!lpwaveOutWrite) { return bRet; } DWORD NewProtect = PAGE_EXECUTE_READWRITE; DWORD OldProtect; bRet = VirtualProtect(lpwaveOutWrite,1,NewProtect,&OldProtect); if (!bRet) { FreeLibrary(hWinmm); return bRet; } char szBuf[] = { 0xC2, 0x0C, 0x00, 0x48}; MoveMemory (lpwaveOutWrite,szBuf,3); //恢復 bRet = VirtualProtect(lpwaveOutWrite,1,OldProtect,&NewProtect); if (!bRet) { FreeLibrary(hWinmm); return bRet; } FreeLibrary(hWinmm); return bRet; }