获取当前时间。
datetime = COleDateTime::GetCurrentTime();
CTime和COleDateTime具有几乎同样的功能。
与CTime相比， COleDateTime的优点在于它支持DWORD变量。
COleDateTime使用的位数是双浮点的两倍，既然CTime只是简单地计算从1970年1月1日之后经过的秒数，所以到了2 0 3 7年它将达到4 2 9 4 9 6 7 2 9 5，从而不能再使用。
//CString—>COleDateTime
COleVariant vtime(strCString);COleDateTime time4=vtime;
//CTime—>time_t
COleDateTime time3(time2);
//time_t—>COleDateTime.

//CString COleDateTime CTime互相转换
//CString—>COleDateTime
strCString=”2003-10-27 6:24:37″;
COleVariant vtime(strCString);
vtime.ChangeType(VT_DATE);
COleDateTime time4=vtime;

 //COleDataTime—>CTime
COleDateTime time1(1977,4,16,2,2,2);
SYSTEMTIME systime;
VariantTimeToSystemTime(time1, &systime);
CTime tm(systime);

//CTime–>COleDateTime
time_t time2=tm.GetTime(); //CTime—>time_t
COleDateTime time3(time2); //time_t—>COleDateTime

CString str = tDate.Format(_T(“%Y-%m-%d”));

  //COleDataTime—>CTime  
  COleDateTime   time1(1977,4,16,2,2,2);  
  SYSTEMTIME   systime;  
  VariantTimeToSystemTime(time1,   &systime);  
  CTime   tm(systime);

参考附录
 
    {
     CString strCString=”ABC”;
     char strchar[256],*pstr;
    
     pstr=(LPSTR)(LPCTSTR)strCString; //CString—->char*
     strcpy(strchar,(LPSTR)(LPCTSTR)strCString); //CString—->char[]
    
     _bstr_t strbstr=pstr; //char*—->_bstr_t
     WCHAR *strWCHAR=strbstr; //b_str_t—>UNICODE
    
     strbstr=strWCHAR;
     pstr=strbstr; //UNICODE—->char*
    
     strCString=”10″;
     int istr=atoi((LPSTR)(LPCTSTR)strCString); //CString、char[]、char*——>int
     strCString.Format(“%d”,istr); //int—–>CString
     sprintf(strchar,”%d”,istr); //int—–>char[]
    
     pstr=new char[256]; //字符串申请空间
     strcpy(pstr,”ABC”); //字符串赋值
     delete []pstr; //字符串释放
    
     string strstring=”ABC”;
     pstr=(char*)strstring.c_str(); //string—->char*
    
     strCString=”2003-10-27 6:24:37″; //CString—>COleDateTime
     COleVariant vtime(strCString);
     vtime.ChangeType(VT_DATE);
     COleDateTime time4=vtime;
    
    
    
     COleDateTime time1(1977,4,16,2,2,2); //COleDataTime—>CTime
     SYSTEMTIME systime;
     VariantTimeToSystemTime(time1, &systime);
     CTime tm(systime);
    
     time_t time2=tm.GetTime(); //CTime—>time_t
     COleDateTime time3(time2); //time_t—>COleDateTime
    
     //判断字符串是否是某种类型
     CString sValue(“123.1”);
     COleVariant vValue(sValue);
    
     BOOL bStrIsFloat = (SUCCEEDED(VariantChangeType(&vValue, &vValue, 0, VT_R8)) && sValue.Find(‘.’) != -1);
     if(bStrIsFloat)
     {
     AfxMessageBox(“浮点”);
     }
    }