Its not what im looking for!
Imagine you created a Mutiple select box. You have two Columns. The first one is the field name, and in the second one you will display the records by clicking on it.
I have a limited space to place this object in the app. So I'd like to stay with the same size to the box, but when click to see the records, the panel where the records are displayed has to be larger then the column width, in other way it will display just the beginning of description