m_pConnection->Open(strConnect,""""adModeUnknown);报错

m_pConnection->Open(strConnect,"","",adModeUnknown);出错！

#import "c:\Program Files\Common Files\System\ADO\msado15.dll" \

no_namespace rename("EOF", "EndOfFile")

#include <iostream>

#include <iomanip> //for setw()

using namespace std;


int main()

{

	::CoInitialize(NULL); 

	_RecordsetPtr m_pRecordset("ADODB.Recordset");

	_ConnectionPtr m_pConnection("ADODB.Connection");


	try

	{

		m_pConnection.CreateInstance("ADODB.Connection");

		// 设置连接字符串，必须是BSTR型或者_bstr_t类型

		_bstr_t strConnect= "Provider=SQLOLEDB;Server=(local);Database=grid;uid=sa;pwd=ksh;";

		//_bstr_t strConnect = "Provider=SQLNCLI10;Password=ksh;Persist Security Info=True;User ID=sa;Initial Catalog=grid;Data Source=(local);";


		//m_pConnection->Open("driver={SQL Server};Server=127.0.0.1;DATABASE=grid;UID=sa;PWD=ksh","","",adModeUnknown);

		//m_pConnection->Open("driver={SQL Server};User ID=sa;Password=ksh;Server=(local);DATABASE=grid","","",adModeUnknown);

		m_pConnection->Open(strConnect,"","",adModeUnknown);

}

catch(_com_error e)

	{

		cerr << "\nERROR:" << (char*)e.Description();//抛出异常

	}

注释掉的哪几种连接都试过了，还是连不上
右边是我的数据库
是连接字符串不对还是什么？都搞一天了还没搞定
------解决方案--------------------
_com_error里面错误信息是？
------解决方案--------------------
HRESULT hr = m_pConnection.CreateInstance("ADODB.Connection");
看一下hr成功否

另外是否初始化ole?
------解决方案--------------------