Printer Spooling - Copy File When All New Bytes Added To ArrayList

I am using filesystemwatcher and im watching printer spool activities:
Private Sub fsw_Changed(ByVal sender As Object, ByVal e As System.IO.FileSystemEventArgs) Handles fsw.Changed
copyfile????
End Sub
But, while printers status is spooling the files and size also changing, how can I copy file bytes by bytes?

Something like this:
Dim a As ByteDim b As ArrayList
Private Sub fsw_Changed(ByVal sender As Object, ByVal e As System.IO.FileSystemEventArgs) Handles fsw.Changed
'+++++++++++++++++++++++++++++++++
get all new bytes and added to arraylist

After the arraylist gathered all bytes, I want to copy back to its original state of files to other location....
+++++++++++++++++++++++++++++++++++++++++++++
End Sub