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。
859K9s2c8@1M7q4)9K6b7g2)9J5c8W2)9J5c8X3#2A6j5%4u0G2M7$3!0X3N6q4)9J5k6i4m8#2j5X3I4A6j5#2)9J5k6h3c8S2N6r3q4Q4x3X3g2S2k6r3!0Q4x3X3g2F1j5i4u0C8K9i4k6W2i4K6u0W2j5$3!0E0i4K6u0r3b7#2u0G2k6W2q4D9e0#2S2Q4x3V1k6U0j5h3c8G2M7X3g2U0L8%4u0V1j5X3W2F1k6r3W2F1k6#2)9J5k6r3q4V1k6r3q4@1k6b7`.`.

浮点型的，float

DateTime is (educated guess) is using Excel's Dublin Julian
format.
See
f3cK9s2c8@1M7q4)9K6b7g2)9J5c8W2)9J5c8X3g2F1i4K6u0W2N6$3W2C8K9i4m8W2k6r3W2S2i4K6u0W2L8%4u0Y4i4K6u0r3N6$3W2C8K9g2)9J5c8V1A6#2L8r3W2S2L8W2)9#2k6X3c8S2P5g2)9#2k6X3&6#2L8h3u0W2M7R3`.`.
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 510K9s2c8@1M7q4)9K6b7g2)9J5c8W2)9J5c8Y4N6%4N6#2)9J5k6h3c8S2N6r3q4T1j5i4y4W2k6X3!0J5N6h3#2Q4x3X3g2A6L8X3k6G2i4K6u0r3x3W2)9J5c8U0t1J5i4K6u0r3y4e0u0T1x3h3x3J5j5K6x3^5z5r3j5^5x3X3x3^5x3q4)9J5k6h3S2@1L8h3H3`. ：
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~