::AfxMessageBox() Function

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C++

Win32

I am trying to create a simple Loader, so I created a new Win32 Project. All went right but when I tryed to add

::AfxMessageBox()

Function I got compiler Error.

This is my code:
StdAfx.h

// stdafx.h : include file for standard system include files,
//  or project specific include files that are used frequently, but
//      are changed infrequently
//

#if !defined(AFX_STDAFX_H__A9DB83DB_A9FD_11D0_BFD1_444553540000__INCLUDED_)
#define AFX_STDAFX_H__A9DB83DB_A9FD_11D0_BFD1_444553540000__INCLUDED_

#if _MSC_VER > 1000
#pragma once
#endif // _MSC_VER > 1000

#define WIN32_LEAN_AND_MEAN		// Exclude rarely-used stuff from Windows headers

#include <windows.h>


// TODO: reference additional headers your program requires here

//{{AFX_INSERT_LOCATION}}
// Microsoft Visual C++ will insert additional declarations immediately before the previous line.

#endif // !defined(AFX_STDAFX_H__A9DB83DB_A9FD_11D0_BFD1_444553540000__INCLUDED_)

&
StdAfx.cpp

// stdafx.cpp : source file that includes just the standard includes
//  EasyServerLoader.pch will be the pre-compiled header
//  stdafx.obj will contain the pre-compiled type information
#include "stdafx.h"
// TODO: reference any additional headers you need in STDAFX.H
// and not in this file

&
resource.h

//{{NO_DEPENDENCIES}}
// Microsoft Developer Studio generated include file.
// Used by EasyServerLoader.rc
//
#define IDI_MAINICON                    101
// Next default values for new objects
//
#ifdef APSTUDIO_INVOKED
#ifndef APSTUDIO_READONLY_SYMBOLS
#define _APS_NEXT_RESOURCE_VALUE        102
#define _APS_NEXT_COMMAND_VALUE         40001
#define _APS_NEXT_CONTROL_VALUE         1000
#define _APS_NEXT_SYMED_VALUE           101
#endif
#endif

& the main cpp file is
EasyServerLoader.cpp

// EasyServerLoader.cpp : Defines the entry point for the application.
//

#include "stdafx.h"

int APIENTRY WinMain(HINSTANCE hInstance,
                     HINSTANCE hPrevInstance,
                     LPSTR     lpCmdLine,
                     int       nCmdShow)
{
 	// TODO: Place code here.
	PROCESS_INFORMATION	pInfo;
	STARTUPINFO			sInfo;

	sInfo.cb				= sizeof(STARTUPINFO);
	sInfo.lpReserved		= NULL;
	sInfo.lpReserved2		= NULL;
	sInfo.cbReserved2		= 0;
	sInfo.lpDesktop			= NULL;
	sInfo.lpTitle			= NULL;
	sInfo.dwFlags			= 0;
	sInfo.dwX				= 0;
	sInfo.dwY				= 0;
	sInfo.dwFillAttribute	= 0;
	sInfo.wShowWindow		= SW_SHOW;

	try
	{
		::CreateProcess("EasyServer.exe",
						NULL,
						NULL,
						NULL,
						FALSE,
						CREATE_SUSPENDED,
						NULL,
						NULL,
						&sInfo,
						&pInfo);
	}
	catch(...)
	{
		//::AfxMessageBox("Oops!, Something went wrong!");
		return -1;
	}

	BYTE	bToWrite[13] = {0x01,
							0x01,
							0x01,
							0xB2,
							0xFE,
							0xB8,
							0xFE,
							0x68,
							0xB8,
							0x12,
							0x48,
							0x90,
							0x90};
	LPVOID	lpBaseAddress[13] = {(void*)0x62DD74,
								 (void*)0x62E272,
								 (void*)0x62E31A,
								 (void*)0x62E389,
								 (void*)0x62E38A,
								 (void*)0x62E469,
								 (void*)0x62E46A,
								 (void*)0x644561,
								 (void*)0x644562,
								 (void*)0x644563,
								 (void*)0x644564,
								 (void*)0x644566,
								 (void*)0x644567};
	DWORD	dNumberOfBytesReadWritten;
	
	BYTE	bRead;
	LPVOID	lpLastAddress = (void*)0x6645FA;
	
	try
	{
		do
		{
			::ResumeThread(pInfo.hThread);
			::Sleep(1);
			::SuspendThread(pInfo.hThread);
			::ReadProcessMemory(pInfo.hProcess,
								lpLastAddress,
								&bRead,
								1,
								&dNumberOfBytesReadWritten);
		}while (bRead != 0x72);
		::ResumeThread(pInfo.hThread);
		::Sleep(100);
		::SuspendThread(pInfo.hThread);
	}
	catch(...)
	{
		//::AfxMessageBox("Oops!, Something went wrong!");
		return -1;
	}

	try
	{
		for (int i=0; i<13; i++)
			::WriteProcessMemory(pInfo.hProcess,
								 lpBaseAddress[i],
								 &bToWrite[i],
								 1,
								 &dNumberOfBytesReadWritten);
		::ResumeThread(pInfo.hThread);
	}
	catch(...)
	{
		//::AfxMessageBox("Oops!, Something went wrong!");
		return -1;
	}
	
	return 0;
}

Help me please to solve this issue.
& I need code block of getting "EasyServer.exe" file size using

GetFileSize()

function also.

Thank you anyway ;)