111 lines
2.8 KiB
C++
111 lines
2.8 KiB
C++
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/*++
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Copyright (c) 2000-2001 Microsoft Corporation
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Module Name:
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Ppo3svrScr.cpp
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Abstract:
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Power Plus screensaver bundled with Lotus Super Office 2000 Japanese could not launch
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Configure dialog on Whistler. But it works on Win 2000.
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The desk.cpl behavior of launching screensaver is changed a bit on Whistler.
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This screensaver's ScreenSaverConfigureDialog ID is not DLG_SCRNSAVECONFIGURE (2003=MSDN must) and unusual.
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Assuming unusual screensaver.
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This shim is applied to screensaver and hacks GetCommandLineW/A return text to change from
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"D:\WINDOWS\System32\ppo3svr.scr /c:1769646"
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to
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"D:\WINDOWS\System32\ppo3svr.scr"
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so that configure dialog appears.
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More Info:
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From desk.cpl (rundll32.exe), Screen Saver operation and CreateProcessW lpCommandLine argument:
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(1) Initial selection of screensaver
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"D:\WINDOWS\System32\ppo3svr.scr /p 721330" -> preview only
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(2) Preview button
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1st call "D:\WINDOWS\System32\ppo3svr.scr /s" -> screen saver
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2nd call "D:\WINDOWS\System32\ppo3svr.scr /p 721330" -> return to preview
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(3) Settings button
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1st call "D:\WINDOWS\System32\ppo3svr.scr /c:1769646" -> configure dialog (not working)
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2nd call "D:\WINDOWS\System32\ppo3svr.scr /p 721330" -> return to preview
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History:
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06/11/2001 hioh Created
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--*/
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#include "precomp.h"
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IMPLEMENT_SHIM_BEGIN(Ppo3svrScr)
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#include "ShimHookMacro.h"
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//
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// Add APIs that you wish to hook to this macro construction.
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//
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APIHOOK_ENUM_BEGIN
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APIHOOK_ENUM_ENTRY(GetCommandLineW)
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APIHOOK_ENUM_ENTRY(GetCommandLineA)
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APIHOOK_ENUM_END
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/*++
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Cut the /c:... string in CommandLine for ppo3svr.scr.
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--*/
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LPWSTR APIHOOK(GetCommandLineW)()
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{
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WCHAR szScreenSaverConfigure[] = L"ppo3svr.scr /c:";
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WCHAR szConfigure[] = L" /c:";
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LPWSTR lpCommandLine = ORIGINAL_API(GetCommandLineW)();
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LPWSTR pw = wcsstr(lpCommandLine, szScreenSaverConfigure);
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if (pw != NULL)
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{
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pw = wcsstr(pw, szConfigure);
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if (pw)
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{
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*pw = 0; // cut from " /c:"
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}
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}
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return (lpCommandLine);
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}
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LPSTR APIHOOK(GetCommandLineA)()
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{
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CHAR szScreenSaverConfigure[] = "ppo3svr.scr /c:";
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CHAR szConfigure[] = " /c:";
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LPSTR lpCommandLine = ORIGINAL_API(GetCommandLineA)();
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LPSTR pc = strstr(lpCommandLine, szScreenSaverConfigure);
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if (pc != NULL)
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{
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pc = strstr(pc, szConfigure);
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if (pc)
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{
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*pc = 0; // cut from " /c:"
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}
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}
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return (lpCommandLine);
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}
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/*++
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Register hooked functions
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--*/
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HOOK_BEGIN
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APIHOOK_ENTRY(KERNEL32.DLL, GetCommandLineW)
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APIHOOK_ENTRY(KERNEL32.DLL, GetCommandLineA)
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HOOK_END
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IMPLEMENT_SHIM_END
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