89 lines
1.5 KiB
C++
89 lines
1.5 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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OverlayPro.cpp
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Abstract:
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This shim changes the return value of RegOpenKeyA from ERROR_SUCCESS
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to ERROR_FILE_NOT_FOUND if the key is "System\CurrentControlSet\Control\Print\Printers"
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No idea why this is needed but it seems to make the app work. Probably
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something else is the cause the app behaves differently but no one investigated
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more into the app's code to figure it out.
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Notes:
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This is an app specific shim.
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History:
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02/16/2000 clupu Created
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--*/
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#include "precomp.h"
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IMPLEMENT_SHIM_BEGIN(OverlayPro)
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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_END
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/*++
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Change the return value of RegOpenKeyA from 0 to 2 if the key is
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"System\CurrentControlSet\Control\Print\Printers"
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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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LPSTR lpSubKey,
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PHKEY phkResult
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)
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{
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LONG lRet;
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//
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// Call the original API
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//
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lRet = ORIGINAL_API(RegOpenKeyA)(hKey, lpSubKey, phkResult);
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if (lRet == 0) {
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if (lstrcmpiA(lpSubKey, "System\\CurrentControlSet\\Control\\Print\\Printers") == 0) {
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DPFN(
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eDbgLevelInfo,
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"OverlayPro.dll, Changing RegOpenKeyA's "
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"return from ERROR_SUCCESS to ERROR_FILE_NOT_FOUND.\n");
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lRet = 2;
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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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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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HOOK_END
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IMPLEMENT_SHIM_END
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