[quote user="Yongan.Fu"]Actually, .r resource file in CE supports auto layout of dialog items[/quote]
Thanks for bringing that to our attention!
I found one example (adrwdemo) that includes BEGIN_VSTACK_LAYOUT, but it's commented out so we don't know whether it's a valid example or not.
I see the Layout Manager Engine documented in the MicroStationAPI help. As with much of the MicroStationAPI, it's long on detail and short on examples, hints and tips.