you can take a look at example 1 here.
If you need just 1 file, remove the for loop and change strFolder variable to strFile that contains the path of you file.
I tried this, but I get an error. Line 4, Char 1. Object required: '[string: "netpass.txt"]'
Set objFS = CreateObject("Scripting.FileSystemObject")
strFolder = "T:\Documents and Settings\student\Desktop"
Set objFolder = objFS.GetFolder(strFolder)
set strFile = "netpass.txt"
If DateDiff("h",strFile.DateLastModified,Now) < 24 Then
strFileName = strFile.Name
WScript.Echo strFileName
WScript.Echo strFolder&"\"&strFileName
objFS.CopyFile strFolder&"\"&strFileName,"c:\tmp"
End If
Please explain what is wrong.