142 lines
2.6 KiB
C++
142 lines
2.6 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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Canvas6.cpp
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Abstract:
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This app. deletes HKEY\CLASSES_ROOT \ .HTC key during uninstall. This
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breaks the ControlPanel -> Add/Remove programs
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Notes:
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This is specific to this app.
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History:
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11/17/2000 prashkud Created
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--*/
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#include "precomp.h"
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IMPLEMENT_SHIM_BEGIN(Canvas6)
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#include "ShimHookMacro.h"
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APIHOOK_ENUM_BEGIN
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APIHOOK_ENUM_ENTRY(RegOpenKeyA)
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APIHOOK_ENUM_ENTRY(RegCloseKey)
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APIHOOK_ENUM_ENTRY(RegDeleteKeyA)
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APIHOOK_ENUM_END
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HKEY g_hOpenKey = 0;
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/*++
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Store the key for .htc
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--*/
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LONG
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APIHOOK(RegOpenKeyA)(
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HKEY hkey,
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LPCSTR lpSubKey,
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PHKEY phkResult)
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{
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LONG lRet = 0;
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lRet = ORIGINAL_API(RegOpenKeyA)(hkey,lpSubKey,phkResult);
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DWORD lcid = MAKELCID(MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US), SORT_DEFAULT);
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if ((hkey == HKEY_CLASSES_ROOT)
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&& lpSubKey
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&& (CompareStringA(lcid, NORM_IGNORECASE, lpSubKey, -1, ".htc", -1) == CSTR_EQUAL))
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{
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if (phkResult)
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{
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g_hOpenKey = *(phkResult);
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}
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}
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return lRet;
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}
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/*++
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Ignore the close if required.
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--*/
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LONG
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APIHOOK(RegCloseKey)(
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HKEY hkey)
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{
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if (g_hOpenKey && (g_hOpenKey == hkey))
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{
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return ERROR_SUCCESS;
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}
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else
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{
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return (ORIGINAL_API(RegCloseKey)(hkey));
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}
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}
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/*++
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Ignore the delete.
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--*/
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LONG
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APIHOOK(RegDeleteKeyA)(
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HKEY hkey,
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LPCSTR lpSubKey)
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{
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LONG lRet = 0;
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DWORD lcid = MAKELCID(MAKELANGID(LANG_ENGLISH, SUBLANG_ENGLISH_US), SORT_DEFAULT);
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if ((hkey == HKEY_CLASSES_ROOT)
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&& lpSubKey
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&& (CompareStringA(lcid, NORM_IGNORECASE, lpSubKey, -1, ".htc", -1) == CSTR_EQUAL))
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{
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if (g_hOpenKey)
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{
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if(RegDeleteValueA(g_hOpenKey,NULL))
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{
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// Add DPF to indicate an error during deletion of the value installed by the app.
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DPFN( eDbgLevelError,
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"Could not delete the value in the key= \"%s\".", lpSubKey);
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}
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RegCloseKey(g_hOpenKey);
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g_hOpenKey = 0;
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}
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lRet = ERROR_SUCCESS;
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}
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else
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{
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lRet = ORIGINAL_API(RegDeleteKeyA)(hkey,lpSubKey);
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}
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return lRet;
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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(ADVAPI32.DLL, RegOpenKeyA)
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APIHOOK_ENTRY(ADVAPI32.DLL, RegCloseKey)
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APIHOOK_ENTRY(ADVAPI32.DLL, RegDeleteKeyA)
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HOOK_END
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IMPLEMENT_SHIM_END
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