本文介绍了一个使用 C++ 和 MFC 的应用程序案例，该程序通过日期选择器控件获取当前选择的日期，并计算出该周的开始和结束日期。具体实现包括获取当前星期几、设置开始和结束日期等。
// SYSTEMTIME m_tmBegTime,m_tmEndTime;在类定义
SYSTEMTIME time;
m_ctlTm.GetCurSel(&time);
int iWeekDay = time.wDayOfWeek;
m_tmBegTime.wYear = time.wYear;
m_tmBegTime.wMonth = time.wMonth;
m_tmBegTime.wDay = time.wDay-iWeekDay+1;
m_tmEndTime.wYear = time.wYear;
m_tmEndTime.wMonth = time.wMonth;
m_tmEndTime.wDay=time.wDay-iWeekDay+7;
CString s1,s2;
s1.Format("%d-%d-%d ",m_tmBegTime.wYear, m_tmBegTime.wMonth, m_tmBegTime.wDay);
s2.Format("%d-%d-%d ",m_tmEndTime.wYear, m_tmEndTime.wMonth, m_tmEndTime.wDay);
CString strMsg;
strMsg.Format("%d-%d-%d ", time.wYear, time.wMonth, time.wDay);
MessageBox(strMsg + s1+s2 );
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