Changing values in a dialog editbox: possible?

Hi everyone, this is my first time posting here. I’ve asked this question on StackOverflow and the Adobe forums, but no one has replied and I’m beginning to lose hope.

I built a dialog in AppleScript for InDesign CS6. It works fine, but I want to add a feature.

Here’s a screenshot of my dialog so far:

The trick I want to do now is to make the “Width” field update when the user completes the enabling group below and tabs to the next value. I’d also like the enabling group to de-activate if the user manually enters a new width.
Something tells me this might not be possible. Anyone have any ideas?

Something is correct. If you really need that sort of dialog, you’ll have to look outside InDesign’s built-in dialogs.