Ok. But the interface for this program has two select menus that read the directory where the files are stored and they're dynamically populated on each select menu. From there one choice of file is made from one of the select menu and other from the other select menu, by clicking on the submit bottom the code behind will process the range of the files selected and it will get displayed to the browser. Thank you so far, sorry if I am driving you crazy with this. Just want to get this clear as possible.