大家帮忙看看(求助，在线等待）

[Horren]

我在调试状态下数据库都可以连接成功。
怎么在ShellExecute（）函数中执行程序就不可以？
错误在这里：
hr = m_pConnection.CreateInstance(__uuidof(Connection)); 第一步
if (SUCCEEDED(hr))
{
//设置连接时间
m_pConnection->put_ConnectionTimeout(long(5));
//连接数据库
hr = m_pConnection->Open(szDSN,"","",adModeUnknown);
if (SUCCEEDED(hr))
{
}
}

在第一步就返回错误，这是怎么回事。我通过其他程序调用就不可以？？
先谢谢大家！

[无我无人]

Two hints:
1) I guess you forgot to call CoIninitialize() before CreateInstance(),
2) look up the error code (hr) in MSDN.

[Horren]

我已经初始化了，直接运行程序可以连接上，通过其他程序调用该程序就连接不上？

[Horren]

错误代码为：-2147221008，各位帮帮忙

[无我无人]

Hi, boy,
>>first of all, -2147221008 is 0x800401F0.
>>then, in <winerror.h> you could find this,
...
#define CO_E_NOTINITIALIZED _HRESULT_TYPEDEF_(0x800401F0L)
...
The error code tells that YOU DIDN'T CALL CoIninitialize().

>>If you are sure that CoIninitialize() has been called, debug the call to see if it failed.

>>If you are sure that CoIninitialize() has been called, and it succeeded, read below:

CoIninitialize() need to be called in each thread. Check if your application is runing as multi-thread, and make sure to call it in each thread before your code proceede.