120 lines
2.1 KiB
C++
120 lines
2.1 KiB
C++
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/*++
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Copyright (c) 2000 Microsoft Corporation
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Module Name:
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ForceAVIWindow.cpp
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Abstract:
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Some apps that use MCI to play their AVIs send messages in an order that
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causes mciavi32 to continually re-open the window it's supposed to be
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playing to.
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The code in mciavi is different on win9x, so the exact reason for this shim
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is hidden in layers of user/avi code. Here we just filter the message that
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causes the avi stuff to not use the existing window it's been given.
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Notes:
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This is an app specific shim.
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History:
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02/22/2000 linstev Created
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09/27/2000 mnikkel Modified to destroy the MCI window on a command line input
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--*/
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#include "precomp.h"
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IMPLEMENT_SHIM_BEGIN(ForceAVIWindow)
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#include "ShimHookMacro.h"
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APIHOOK_ENUM_BEGIN
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APIHOOK_ENUM_ENTRY(PostMessageW)
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APIHOOK_ENUM_END
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BOOL g_bDestroyWindow= FALSE;
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/*++
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Filter AVIM_SHOWSTAGE
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--*/
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BOOL
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APIHOOK(PostMessageW)(
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HWND hWnd,
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UINT Msg,
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WPARAM wParam,
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LPARAM lParam
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)
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{
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#define AVIM_SHOWSTAGE (WM_USER+104)
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BOOL bRet;
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// Eat the AVIM_SHOWSTAGE message
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if (Msg != AVIM_SHOWSTAGE)
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{
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bRet = ORIGINAL_API(PostMessageW)(
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hWnd,
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Msg,
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wParam,
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lParam);
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}
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else
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{
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LOGN( eDbgLevelError,
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"[APIHook_PostMessageW] AVIM_SHOWSTAGE message discarded");
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// if command line specified to destroy the MCI window do so now.
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if (g_bDestroyWindow)
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{
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MCIWndDestroy(hWnd);
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}
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bRet = TRUE;
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}
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return bRet;
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}
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/*++
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Register hooked functions
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--*/
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BOOL
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NOTIFY_FUNCTION(
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DWORD fdwReason)
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{
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if (fdwReason == DLL_PROCESS_ATTACH)
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{
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CSTRING_TRY
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{
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CString csCl(COMMAND_LINE);
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g_bDestroyWindow = csCl.CompareNoCase(L"DestroyMCIWindow") == 0;
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}
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CSTRING_CATCH
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{
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return FALSE;
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}
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}
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return TRUE;
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}
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HOOK_BEGIN
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APIHOOK_ENTRY(USER32.DLL, PostMessageW)
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CALL_NOTIFY_FUNCTION
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HOOK_END
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IMPLEMENT_SHIM_END
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