我想获取相对于MFC中当前系统时间的UTC或GMT时间。我已经尝试使用CTime的GetGmtTm(),如下所示structtm*osTime=NULL;tmt1=*(currenttime.GetGmtTm(osTime));CTimecurrentUTCTime(1900+t1.tm_year,t1.tm_mon+1,t1.tm_mday,t1.tm_hour,t1.tm_min,t1.tm_sec,t1.tm_isdst);CTimeSpants=currentUTCTime-oldtime;//oldtimepointstoUnixEpoch1/1/197000:00:00un