//MFC秒转换时分秒
void SecToTime(int nSeconds, CString& strTime)
{
    int nHour = 0;
    int nMin = 0;
    int nSec = 0;
    
    nHour = nSeconds / 3600;
    nMin = (nSeconds - nHour * 3600) / 60;
    nSec = nSeconds - nHour * 3600 - nMin * 60;
    
    strTime.Format(_T("%02d:%02d:%02d"), nHour, nMin, nSec);
}