Thank you, Evan. I get most of the way there, then a couple of bumps.

>>Then, whenever you need parent information, call a method...
I am using the txtbtns (next, Previous, etc) class of VFP.
Would I attach code to the Click event of Next and Previous, etc?
I don't especially want to modify their stuff.

I added a cmd button of my own, just to test On Click method.
STORE facilityno TO lcChildKey
REQUERY()
I get error, "function not supported on native tables."

I think I want to say, whenever the childkey changes, do the requery.
Is this Interactive Change?

I'm close, not on second yet.
Thanks for your time and consideration,
Sylvia