Windows 7 - How to Configure Task Scheduler to Run Program When Dial-up Connection

Windows 7 64-Bit
Dial-up connection to Internet

I want to use Windows 7 Task Scheduler to run a program IMMEDIATELY AFTER a dial-up connection is made to the internet.

How do I configure Windows 7 Task Scheduler to do this, please?

I am familiar with Task Scheduler and command line parameters. Any help is appreciated.

Thanks

FYI: If an example is needed, Microsoft Security Essentials can be configured to update the virus definitions through this path with argument:

C:\Program Files\Microsoft Security Essentials/MpCmdRun.exe SignatureUpdate

Perhaps someone can use this to show how to configure Windows 7 Task Scheduler to update MSE virus definitions once the dial-up connection has been made?

Otherwise, as an example, any other program to run once a dial up connection is established would be OK, thanks