C++访问SQL Server的问题，初次搞C++，搞不定了

[阿浩No_1]

代码如下：

#include <iostream>
#import "c:\\Program Files\\Common Files\\System\\ado\\msado15.dll" no_namespace rename("EOF","adoEOF") rename("BOF","adoBOF")

int main()
{
_ConnectionPtr m_pConnection;
_RecordsetPtr m_pRecordset;
_bstr_t strConnect = "Provider=SQLOLEDB;Data Source=CH-SPIDER;User ID=sa;Paswword=aabbcc123;Initial Catalog=MyStocks";

_bstr_t sql = "SELECT COUNT(*) FROM [CoreConception]";


m_pRecordset = m_pConnection->Execute(sql, NULL, adCmdText);

_variant_t vIndex = (long)0;
_variant_t vCount = m_pRecordset->GetCollect(vIndex);///取得第一个字段的值放入vCount变量
m_pRecordset->Close();
m_pConnection->Close();
CoUninitialize();

std::cout << "Hello World!\n";
}

报错如下：

[zwfgdlc]

没有初始化COM, 开头加行

CoInitialize();

[zgl7903]

Execute 之前 先要挂接和打开数据库

	_ConnectionPtr m_pConnection;
	_variant_t RecordsAffected;
	try
	{
		m_pConnection.CreateInstance(__uuidof(Connection));
		m_pConnection->Open("Provider=Microsoft.Jet.OLEDB.4.0;Data Source=Northwind.mdb","","",adModeUnknown);
	}
	catch(_com_error e)
	{
		CString errormessage;
		errormessage.Format("连接数据库失败!\r错误信息:%s",e.ErrorMessage());
		AfxMessageBox(errormessage);
		return;
	}
 
	try
	{
		_bstr_t strCmd="INSERT INTO Employees(EmployeeID,FirstName,LastName,HireDate,City,Country) VALUES(10,'Mary','Williams','15/4/1993 12:00:00','New York','USA')";
		m_pConnection->Execute(strCmd,&RecordsAffected,adCmdText);
	}
	catch(_com_error &e)
	{
		AfxMessageBox(e.Description());
	}
	if(m_pConnection->State)
	{
		m_pConnection->Close();
	}