Universal fix for "Memory/DLL corruption" in MapleStory

dllmain.cpp

#include <cstdint>

#include <Windows.h>
#include <detours.h>

DWORD g_getTickCount = GetTickCount();
DWORD (__stdcall *g_real_GetTickCount)(void) = GetTickCount;

DWORD g_timeGetTime = timeGetTime();
DWORD (__stdcall *g_real_timeGetTime)(void) = timeGetTime;

DWORD corrected_GetTickCount()
{
	return (g_real_GetTickCount() - g_getTickCount) % INT32_MAX;
}

DWORD corrected_timeGetTime()
{
	return (g_real_timeGetTime() - g_timeGetTime) % INT32_MAX;
}

int __stdcall DllMain(HMODULE hModule, unsigned long ul_reason_for_call, void *lpReserved)
{
	if(DetourIsHelperProcess())
	{
		return 1;
	}

	switch(ul_reason_for_call)
	{
	case DLL_PROCESS_ATTACH:
		DetourRestoreAfterWith();
	case DLL_PROCESS_DETACH:
		DetourTransactionBegin();
		DetourUpdateThread(GetCurrentThread());
		((ul_reason_for_call == DLL_PROCESS_ATTACH)? DetourAttach:DetourDetach)(reinterpret_cast<void**>(&g_real_GetTickCount), corrected_GetTickCount);
		((ul_reason_for_call == DLL_PROCESS_ATTACH)? DetourAttach:DetourDetach)(reinterpret_cast<void**>(&g_real_timeGetTime), corrected_timeGetTime);
		DetourTransactionCommit();

		break;
	}

	return 1;
}