การนับจำนวนแถวตารางในภาษา PHP โดยใช้ db SQL Sv 2008 ทำยังไงครับ

	$objConnect = mssql_connect("localhost","sa","") or die("Error Connect to Database");
	$objDB = mssql_select_db("mydatabase");
	// Search By Name or Email
	$strSQL = "SELECT  * FROM customer  WHERE (Name LIKE '%".$_GET["txtKeyword"]."%' or Email LIKE '%".$_GET["txtKeyword"]."%' )  ";
	$objQuery = mssql_query($strSQL) or die ("Error Query [".$strSQL."]");
	$Num_Rows = mssql_num_rows($objQuery);

<?
$i=1;
while($objResult = mssql_fetch_array($objQuery))
{
?>
<?if($bg == "white")
{
$bg = "#99FFCC";
} else {
$bg = "white";
}
?>
<tr bgcolor="<?=$bg?>">
<td align="center"><?=$i;?></td>
<td><?=$objResult["mem_thname"];?></td>
<td><?=$objResult["mem_thsurname"];?></td>
<td><?=$objResult["mem_enname"];?></td>
<td><?=$objResult["mem_ensurname"];?></td>
<td><?=$objResult["mem_username"];?></td>
<td><?=$objResult["mem_password"];?></td>
<td align="center"><?=$objResult["depart"];?></td>
<td align="center"><a href="user_edit.php?Mem_1=<?=$objResult["id"];?>"><img src="edit.gif" alt="แก้ไข"></a></td>
<td align="center"><a href="JavaScript:if(confirm('Confirm Delete?')==true){window.location='user_delete.php?Mem_1=
<?=$objResult["id"];?>';}"><img src="delete.gif" alt="ลบ"></a></td>
</tr>
<?
$i=$i+1;
}
?>

$Num_Rows = mssql_num_rows($objQuery);