auto
com里一般是variant之类的吧

- -不懂, 把COM的都试一遍, BSTR

5楼的应该可以.楼主可以试下.

谢谢，那么如果我有6个DWORD，分别是年月日，时分秒。
怎么样把这个auto的变量拆分给这6个DWORD呢？

试试 coledatetime.

BSTR是文本类型吧

对,你可以无视我.我只是帮你顶下贴的,.顺便也学习下.

由此看出，落后10年并不夸张。
http://microsoft.public.data.ado.narkive.com/CRofQlOX/cadorecordbinding-addate

浮点型的，float

DateTime is (educated guess) is using Excel's Dublin Julian
format.
See
http://en.wikipedia.org/wiki/Julian_day_number
and search for "Dublin" on web page

Whole numbers are the number of days.
Fractional numbers are the time out of a 24 hour day.
0.0 is 30/Dec/1899
1.0 is 31/Dec/1899
2.0 is 1/Jan/1900
3.0 is 2/Jan/1900
4.0 is 3/Jan/1900
and so on
0.0 is 00:00:00 on 24 hour clock
0.5 is 12:00:00 on 24 hour clock
0.25 is 06:00:00 on 24 hour clock
0.75 is 18:00:00 on 24 hour clock
0.10 is 02.24:00 on 24 hour clock
and so on.

3Q~,虽然有些看不懂~

我在不确定长度的时候，都是CString字符串，这样就可以保证容纳了；后面在按照需要转换

我随便说的，哈哈
网上搜了下(关键词："adDate" ado c++)，有跟你需求相反的，可以参考下：
来自 http://www.databaseforum.info/2/22/52b1c2c388f82c80.html ：
Visual Studio C++ >> How to use a unix timestamp for an adDate ADO Parameter in c++ without COleDateTime

Just thought I'd share this because it has been bugging me for
hours...

When you're calling a SQL Server stored procedure with a DATE
parameter, this is how you can add the parameter in ADO (without the
need for COleDateTime)....

double * UnixTimestampToVariantTime(time_t unixTimestamp);

....

dtmGenerated = UnixTimestampToVariantTime(time(NULL)); // This
converts the current unix timestamp (calculated by time(NULL)).

sqlCmdUpdateEvents->Parameters->Append(sqlCmdUpdateEvents-

(ParameterDirectionEnum)adParamInput, sizeof(DATE),
(DATE)*dtmGenerated));

....

// Converts a unix timestamp into one that ADO can decipher
double * UnixTimestampToVariantTime(time_t unixTimestamp)
{
double *dblDBTS = new double;
SYSTEMTIME dbDate;
ZeroMemory(&dbDate, sizeof(SYSTEMTIME));

// Get the tm Struct for the specified unix timestamp
struct tm *timeUnits = localtime(&unixTimestamp);

// Translate the tm struct into a SYSTEMTIME struct
dbDate.wDay = (WORD)timeUnits->tm_mday;
dbDate.wDayOfWeek = (WORD)timeUnits->tm_wday;
dbDate.wHour = (WORD)timeUnits->tm_hour;
dbDate.wMilliseconds = (WORD)0;
dbDate.wMinute = (WORD)timeUnits->tm_min;
dbDate.wMonth = (WORD)timeUnits->tm_mon+1;
dbDate.wSecond = (WORD)timeUnits->tm_sec;
dbDate.wYear = (WORD)timeUnits->tm_year+1900;

// Calculate and return the Variant time for the populated SYSTEMTIME
struct
SystemTimeToVariantTime((LPSYSTEMTIME)&dbDate, dblDBTS);
return dblDBTS;
}

... Just snippets, but you get the idea.

这里SystemTimeToVariantTime是关键，哈哈，我搜索了下果真有个VariantTimeToSystemTime函数，这下就搞定啦

感谢~