Have you read 'Returning Values from do script' section in InDesignCS3_ScriptingGuide_AS.pdf (page 7) ?
Actually, no I had not, but it convinces me that I'm posting in the wrong forum so I'm marking this answered.
How 'bout running the script via bridgeTalk from InDesign? BridgeTalk
can pass messages pretty easily...
Thanks for the suggestion.
To be honest, I was just trying to do a nice elegant dialog box with Bridge because Illustrator CS2 didn't know Script UI and I thought since everyone has CS3 Bridge on their machines already... But I've settled for 3 Applescript dialogs instead, so the fight is over.
1.5 days tinkering with JS. 1.5 hours recoding in AS. Whee...
Why not just use Interface Builder if it's Mac only?