[C++]Metin2 How to Hook Game Function(Basic)

// dllmain.cpp : Defines the entry point for the DLL application.
#include "stdafx.h"
#include <detours.h>

// int sub_56E1B0(const char*)

typedef int(*tHook)(const char*) ;
tHook oHook; // our original function

int hHook(const char* a)
{
	return oHook("Hooked when original function called!");
}

BOOL APIENTRY DllMain( HMODULE hModule,
                       DWORD  ul_reason_for_call,
                       LPVOID lpReserved
					 )
{
	switch (ul_reason_for_call)
	{
	case DLL_PROCESS_ATTACH:
		oHook = (tHook) DetourFunction((PBYTE) 0x0056E1B0, (PBYTE) hHook);
	case DLL_THREAD_ATTACH:
	case DLL_THREAD_DETACH:
	case DLL_PROCESS_DETACH:
		break;
	}
	return TRUE;
}