Retrieving last line of a txt file with a VBscript - string

Question

Before all, I want to say that I am not a programmer, so this may be basic for some people but surely not for me!!
The task that I want to accomplish is to retrieve some characters of a data file that is imported automatically from a server.
Data is stored in lines in a CSV or tabbed .txt file, each line consists of date and some numeric values. The format is always the same, only the file grows in one line each time a new value is entered.
What I need the script to do, is open that file (wich adress is known and constant) search for the last line, and then extract a string from that line and write it on a different .TXT file, from where I can import it to another specific software as a raw value.
The part in the middle (extracting string) is fairly simple, but opening and isolating the last line is far too much for me.
Thanks everybody for helping!

Answer 1

dim path
path = "fileName.txt"
otherOption(path)
function otherOption(fileName)
const read = 1
dim arrFileLines()
set objArgs = CreateObject("scripting.FileSystemObject")
if objArgs.FileExists(fileName) then
set objFile = objArgs.OpenTextFile(fileName,read)
i=0
do until objFile.AtEndOfStream
redim preserve arrFileLines(i)
arrFileLines(i) = objFile.ReadLine
i = i + 1
loop
objFile.Close
end if
wscript.Echo arrFileLines(i-1)
end function