ผมใช้ adodb กับ ms access ผมจะนับจำนวน record ใน microsoft access โดยใช้ adodb ยังไงครับ

include "connect.php";
$conn->open($sql);
$str = "SELECT tb_Contract.*,tb_Vender.* 
			FROM tb_Contract,tb_Vender  
			WHERE (tb_Vender.ID_Vender=tb_Contract.ID_Vender) 
			AND  ID_Contract = 2";
$rs = $conn->execute($str);

$TotalRecord = $rs->RecordCount();

echo $TotalRecord;

	$strConn = new COM("ADODB.Connection") or die("Cannot start ADO");
	$strConn->Open("DRIVER={Microsoft Access Driver (*.mdb)}; DBQ=" . realpath("mydatabase.mdb")); 
	$strSQL = "SELECT * FROM customer ";
	$objRec = new COM("ADODB.Recordset");
	$objRec->Open($strSQL, $strConn, 1,3);

$db = "DB_PCRent.mdb";
$conn = new COM("ADODB.Connection") or die("Cannot start ADO");;
$sql->Open("DRIVER={Microsoft Access Driver (*.mdb)}; DBQ=". realpath($db));
$Rec = new COM("ADODB.Recordset");

include "connect.php";
$str = "SELECT * 
			FROM tb_Contract";
$Rec->Open($str, $conn, 1,3);

$TotalRecord = $Rec->RecordCount();
echo $TotalRecord;