How to detect when someone joins the network environment

Question

I'm sharing my Internet connection with someone who's only occasionally online. When his PC is running, it's visible in the network environment.

How can I have my computer popup an alert if that user logs on to the network environment? I'd like to know when I can free some bandwidth.

Answer 1

In what way is the PC visible in the network environment?

Here's a very simple batch script which you could schedule to run repeatedly:

@ECHO OFF
NET VIEW | FIND "PCNAME" > NUL
IF NOT ERRORLEVEL 1 NET SEND %USERNAME% "Foo is here" > NUL