get properties to display in a UI??

I've been trying to figure this out and can't find this information anywhere in the help to point me in the right direction.

Basically I want to be able to create a Floating Dialog that could read the selected object properties.

So example, lets say i have a box. I want to read the "Height" value and display it in this floating UI.

I can certaily easily selection objects and chagne their values in mass but getting their current settings to be input into a dialog box seems hard to find the right info.

The main idea is to have a script that I could run when I select a bunch of objects and it would build a floating dialog box with spinners for each objects values. Of course I'd control which properties of the objects I'd want to read.

I hope this makes sense to someone.

Thanks