CString strConn = "SERVER=192.168.0.100;DATABASE=db_name;UID=sa;PWD=sa_pwd;DRIVER={Sql Server Native Client 11.0};";

CDatabase db;
try
{
    cout << "开始连接数据库...";
    db.SetLoginTimeout(30);
    db.OpenEx(g_strSqlConnStr, CDatabase::noOdbcDialog);  //forceOdbcDialog
    db.SetQueryTimeout(60);
    cout << "连接数据库成功...";
}
catch (CDBException *e)
{
    CString strErrMsg;
    char buffer[1024];
    e->GetErrorMessage(buffer, 1024);
    strErrMsg.Format("连接数据库失败,原因:%s", buffer);
    db.Close();
    e->Delete();
    return false;
}

//里面的SERVER要填写IP名称，不需要填写ODBC的配置名称