如何判断数据库连接是否成功 php+mssql2000

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$dbuser = 'sa';
$dbpsd = 'sa';
$dbname = 'redmoon12';
$dbip = '127.0.0.1';


$sconn = new COM("ADODB.Connection") or die("Cannot start ADO");
$connstr = "Provider=SQLOLEDB;
Persist Security Info=False;
User ID=".$dbuser.";
Password=".$dbpsd.";
Initial Catalog=".$dbname.";
Data Source=".$dbip."
";
$sconn->Open($connstr);

把数据库故意改错，他连我的地址都给报出来了，怎么只返回一个错误提示