80 lines
1.4 KiB
C++
80 lines
1.4 KiB
C++
/*++
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Copyright (c) 2002 Microsoft Corporation
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Module Name:
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BackupExec.cpp
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Abstract:
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BackupExec is calling SendMessageW with a TVM_GETITEM message but has an
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uninitialized lParam at one point. We detect this and initalize the values.
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Notes:
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This is an app specific shim.
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History:
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09/25/2002 mnikkel Created
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--*/
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#include "precomp.h"
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IMPLEMENT_SHIM_BEGIN(BackupExec)
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#include "ShimHookMacro.h"
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APIHOOK_ENUM_BEGIN
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APIHOOK_ENUM_ENTRY(SendMessageW)
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APIHOOK_ENUM_END
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/*++
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Make sure the lParam is correct.
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--*/
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BOOL
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APIHOOK(SendMessageW)(
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HWND hWnd,
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UINT uMsg, // TVM_GETITEM
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WPARAM wParam,
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LPARAM lParam
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)
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{
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if (uMsg == TVM_GETITEM)
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{
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if (lParam != NULL)
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{
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LPTVITEMEX lpItem = (LPTVITEMEX)lParam;
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// On TVIF_TEXT, the size in cchTextMax should be reasonable, if not then init.
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if ((lpItem->mask & TVIF_TEXT) &&
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((lpItem->cchTextMax > 300) || lpItem->cchTextMax <= 0))
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{
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LOGN(eDbgLevelError, "Correcting invalid TVITEMEX struct, max text %d.", lpItem->cchTextMax);
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lpItem->mask &= !TVIF_TEXT;
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lpItem->pszText = NULL;
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lpItem->cchTextMax = 0;
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}
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}
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}
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return ORIGINAL_API(SendMessageW)(hWnd, uMsg, wParam, lParam);
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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(USER32.DLL, SendMessageW)
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HOOK_END
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IMPLEMENT_SHIM_END
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