การกำหนดค่าให้กับ <input type='file' value='???'> มันทำยังไงครับ

$objConnect = mysql_connect("localhost","root","root") or die("Error Connect to Database");
$objDB = mysql_select_db("mydatabase");
 
$strSQL = "UPDATE files ";
$strSQL .=" SET NAME = '".$_POST["txtName"]."' WHERE FilesID = '".$_GET["FilesID"]."' ";
$objQuery = mysql_query($strSQL);      
 
if($_FILES["filUpload"]["name"] != "")
{
	if(move_uploaded_file($_FILES["filUpload"]["tmp_name"],"myfile/".$_FILES["filUpload"]["name"]))
	{
	//*** Update New File ***//
	$strSQL = "UPDATE files ";
	$strSQL .=" SET FilesName = '".$_FILES["filUpload"]["name"]."' WHERE FilesID = '".$_GET["FilesID"]."' ";
	$objQuery = mysql_query($strSQL);      
	echo "Copy/Upload Complete<br>";
	}
}