Create horizontal menu (tabs)

Can someone help me to create a horizontal menu (tabs) and below of the menu to be loading content that depends of horizontal menu?
It is possible? I tried to create with button and horizontal menu, but the problem is that I can’t crate and another panel below of menu

Have you found a solution? I’m in the same boat. Maybe a RowList with fixedFocus?

Any luck with the tabs? I’m trying to create a menu (tabs) with items horizontal aligned.