detect vpn connection

[firefighting]

sorry for the misleading title. Not sure what to call it.
ok, I want to run a batch file that opens a VPN login web page. Then the user enters user name and pasword on the web page. The page then shows successful login. The question is, how can I detect a successful connection has been made and then continue with the batch file and map some drives?
many thanks

[FN-GM]

You could make a VBS file to ping a remote server when the server replies then map the network drives.

[firefighting]

You could make a VBS file to ping a remote server when the server replies then map the network drives.

wow! thanks for replying so quickly. Worth a go.

[Michael]

You could just permanently map network drives (on a laptop for example), and they'd only be accessible if VPN connected successfully.
Not quite sure how you'd do it the other way around (with the above method). Keep periodically pinging the DNS server and if it fails delete the drives?