Embed "Thread ID" in User-Data or elsewhere?

Embed "Thread ID" in User-Data or elsewhere? SearchSearch
Author Message
Buzzben
Unregistered guest
Posted on Monday, December 19, 2005 - 01:39 am:   

I want to deliver and SMS message, and be able to track when it's replied to. Is there a way to hide an ID in the header that will be returned in the reply?

Is there any other way anyone can think of that would provide this functionality?

Thanks