关于VC++方面时间转换

DWORD string2long(CString str_time)
{
	//Format("%Y-%m-%d %H:%M:%S") 
	//格式:2013-01-01 12:12:12
	struct tm stTime;   //定义tm类型变量
	sscanf_s(str_time, "%d-%d-%d %d:%d:%d",
		&stTime.tm_year, &stTime.tm_mon, &stTime.tm_mday, &stTime.tm_hour,
		&stTime.tm_min, &stTime.tm_sec); //强制转换为char*，再使tm变量获取时间值
	stTime.tm_year = stTime.tm_year - 1900;
	stTime.tm_mon = stTime.tm_mon - 1; //转换相对1900.01的时间长度
	time_t t_time = mktime(&stTime);      
	/*TRACE("\n\n%d/%d/%d %d:%d:%d\n",stTime.tm_year + 1900,stTime.tm_mon + 1,stTime.tm_mday,
		stTime.tm_hour,stTime.tm_min,stTime.tm_sec);*/
	//TRACE("%d\n", t_time); 
	return t_time;
}

CString long2string(DWORD d_time)
{
	time_t t_time = (time_t)d_time;
	struct tm mTime;   //定义tm类型指针
	localtime_s(&mTime,&t_time);  //获取时间
	CString str_time;
	str_time.Format("%d-%d-%d %d:%d:%d\n",mTime.tm_year + 1900,mTime.tm_mon + 1,mTime.tm_mday,
		mTime.tm_hour,mTime.tm_min,mTime.tm_sec);
	//TRACE(str_time+"\n");
	return str_time;
}

CString getLocalTime()
{
	//CTime::GetTickCount() 获取系统时间精确到秒
	CString str_time;
	str_time.Format(_T("%d"),CTime::GetTickCount());
	return str_time;
}

struct MyDate long2time(DWORD d_time)
{
	time_t t_time = (time_t)d_time;
	struct tm mTime;   //定义tm类型指针
	struct MyDate mydate;
	localtime_s(&mTime,&t_time);  //获取时间
	mydate.year = mTime.tm_year + 1900;
	mydate.month = mTime.tm_mon + 1;
	mydate.day = mTime.tm_mday;
	mydate.hour = mTime.tm_hour;
	mydate.minute = mTime.tm_min;
	mydate.second = mTime.tm_sec;
#ifdef DEBUG
	TRACE("%d/%d/%d %d:%d:%d\n",mydate.year,mydate.month,mydate.day,
		mydate.hour,mydate.minute,mydate.second);
#endif
	return mydate;
}

DWORD currentTimeSeconds()
{
	CString str;
	str.Format(_T("%ld"),CTime::GetTickCount());
	DWORD d_value = _ttol(str);
	return d_value;
}

CString GetFomatTime()
{
	CString str;
	CTime time;
	time = CTime::GetCurrentTime();
	str = time.Format("%Y-%m-%d %H:%M:%S");
	return str;
}

CString GetTimeFileName()
{
	CString str;
	CTime time;
	time = CTime::GetCurrentTime();
	str = time.Format("%Y%m%d%H%M%S");
	return str;
}