www.gusucode.com > 自动检测串口上是否有通信设备，然后开启发送短信功能，vc > 自动检测串口上是否有通信设备，然后开启发送短信功能，vc下调试通过/smstest/StdAfx.cpp

    // stdafx.cpp : source file that includes just the standard includes
//	SmsTest.pch will be the pre-compiled header
//	stdafx.obj will contain the pre-compiled type information

#include "stdafx.h"