_VFP vs _SCREEN

(I checked the ProFox archive but searching for _VFP _SCREEN (with underscore, with underscored escaped, and without underscore) did not turn up any matches or at least the ones applicable). I know we've discussed this somewhere in the past but could not find the reference.)

I was adding another "global" application attribute for a signal flag for later code to reference, and I realized I've always used the _SCREEN object. Would seem more logical to reference the _VFP object. Your thoughts on this design decision?

tia, --Michael