hello there..
 can somebody give me some sample code in managing input and output file in asp using vb. thank you

Here's some example:
Opening file for writing:
dim s as String="Test"
dim di as DirectoryInfo = new DriectoryInfo("c:\inetpub\wwwroot\vbnetweb\counter s")
fi = New FileInfo(di.FullName & "\pagecounter.txt")
fs. fi.OpenWrite

Write a line to a file:
dim sw as new StreamWriter(Server.MapPath(".") & "\text.txt",True)
sw.WriteLine("This is a test")
sw.Close()

Hope this helps. Tell if you need more info.