Check for connection

[majidkamali1370]

Hi.
How can I understand that, user is connected to the internet?
I mean, immediately after connecting to internet.
For example immediately after connecting to internet, my program updates itself.
Thanks :-)

[sadavied]

You can have it send ICMP packets to your 'update server' or something like that.

[rishabhagl]

See how many user are connected to port 80 of a remote machine using 'netstat'.