Travel Distance in Custom Properties

[pati]

Hi, I know there is Travel Distance in property test.
But I want to do this with Custom Properties.

http://forum.tyflow.com/thread-974.html?...l+distance
Tyson said in this thread, Is able.

But I couldn't  understand how to get it...
Can someone teach me?

Thank you.

[keithwmg]

I wish I know that too
any help ?