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

#pragma comment(lib, "detours.lib")

static int (WINAPI* TrueMessageBoxA)(HWND hWnd, LPCSTR lpText, LPCSTR lpCaption, UINT uType) = MessageBoxA;

int __stdcall FuncHookMessageboxA(HWND hWnd, LPCSTR lpText, LPCSTR lpCaption, UINT uType)
{
	MessageBoxA(0, lpText, lpCaption, 0);
	return MessageBoxA(hWnd, lpText, lpCaption, uType);
}

BOOL APIENTRY DllMain( HMODULE hModule,
                       DWORD  ul_reason_for_call,
                       LPVOID lpReserved
					 )
{	
	switch (ul_reason_for_call)
	{

	case DLL_PROCESS_ATTACH:
		DisableThreadLibraryCalls(hModule);
		DetourRestoreAfterWith();
		
		DetourTransactionBegin();
		DetourUpdateThread(GetCurrentThread());
		DetourAttach(&(PVOID&)TrueMessageBoxA, FuncHookMessageBoxA);
		DetourTransactionCommit();
		break;
	case DLL_PROCESS_DETACH:
		DetourTransactionBegin();
		DetourUpdateThread(GetCurrentThread());
		DetourDetach(&(PVOID&)TrueMessageBoxA, FuncHookMessageBoxA);
		DetourTransactionCommit();
		break;
	}
	return TRUE;
}