Other than having a Reflections session permanently logged on, I don't
think the HP can directly start a program on your server.  (Others may
prove me wrong on this).

But, you can write a VB.Net (or C#) program that will wait for a file to be
created in a folder on your server.  At that point the VB program
would "wake up" and process the file.  VB allows you to program a "file
created" event into your program so that cpu is not eaten up.

sub add_file_watch
  Dim watchfolder As New IO.FileSystemWatcher

  watchfolder.Path = "c:\nbxtract"
  watchfolder.NotifyFilter = NotifyFilters.FileName
  AddHandler watchfolder.Created, AddressOf process_file
  watchfolder.EnableRaisingEvents = True
  watchfolder.WaitForChanged(WatcherChangeTypes.Created)
end sub

sub process_file
 ...do your file processing
end sub

* To join/leave the list, search archives, change list settings, *
* etc., please visit http://raven.utc.edu/archives/hp3000-l.html *