学步园

// 起始和结束日期时间关联的日期时间变量
COleDateTime m_tStartDate;
COleDateTime m_tStartTime;
COleDateTime m_tEndDate;
COleDateTime m_tEndTime;

// 格式化后的起始和结束的日期时间变量
COleDateTime  m_tStartDateTime;
COleDateTime  m_tEndDateTime;

void CXXXDlg::OnCalculate()
{
 // TODO: Add your control notification handler code here
 UpdateData();

 // 格式化起始和结束的日期时间
 m_tStartDateTime.SetDateTime(m_tStartDate.GetYear(),
                                                            m_tStartDate.GetMonth(),
                                                            m_tStartDate.GetDay(),
                                                            m_tStartTime.GetHour(),
                                                            m_tStartTime.GetMinute(),
                                                            m_tStartTime.GetSecond());

 m_tEndDateTime.SetDateTime(m_tEndDate.GetYear(),
                                                            m_tEndDate.GetMonth(),
                                                            m_tEndDate.GetDay(),
                                                            m_tEndTime.GetHour(),
                                                            m_tEndTime.GetMinute(),
                                                            m_tEndTime.GetSecond());
 COleDateTimeSpan tMinute = m_tEndDateTime - m_tStartDateTime;  // 计算两个日期时间的差值
 int iMinute = (int)tMinute.GetTotalMinutes();
 CString strMinute = _T("");
 strMinute.Format("%d", iMinute);
 MessageBox(strMinute);
}

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