I'd do it like this
Code:
<user>username1</user><password>pw1</password>
<user>username2</user><password>pw2</password>
<user>username3</user><password>pw3</password>
<user>username4</user><password>pw4</password>
<user>username5</user><password>pw5</password>
download the source to the .txt above from your ftp.
Use a streamreader to read every line.
while not reader.endofstream
dim sline as string = reader.readline
dim user as string = stringbetween function(source, "<user>", "</user>")
dim pw as string = stringbetween function(source, "<password>", "</password>")
if textbox1.text = user And Textbox2.text = pw then
'w/e
end if
end while
Figure out the stringbetween / streamreader function. I won't give you full source code. Attempt it.