VC++获取Access查询的列名

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// GetConnection()自定义函数，获取连接指针，类型_ConnectionPtr
_ConnectionPtr pConnection = GetConnection();
	_CommandPtr pCommand;
	_RecordsetPtr pRs;
	try{
    
    
		pCommand.CreateInstance(__uuidof(Command));
		pCommand->ActiveConnection = pConnection;
		pCommand->CommandText = "select * from tablename";
		pCommand->CommandType = adCmdText;
		pCommand->Parameters->Refresh();
		pRs = pCommand->Execute(NULL, NULL, adCmdUnknown);
		// 列名集合
		std::vector<std::string> fieldNames;
		for (size_t i = 0; i < pRs->GetFields()->GetCount(); i++)
		{
    
    
			fieldNames.emplace_back(pRs->GetFields()->GetItem(_variant_t((long)i))->GetName());
		}
		... // fieldNames列名集合
	}
	catch (_com_error e){
    
    
		...
	}