When you open the options.gobj from Ineisis in the GUI editor, when you click on the Video or Audio+Misc buttons in the tabs, the region switches (inside the editor). I have been needing to link such behavior in code with regions and tabs I create, how was this done in the editor?

There are 2 regions each assigned to different tab.
Region a,b;
Tabs tabs;
tabs.tab(0)+=a;
tabs.tab(1)+=b;

There is a tutorial about tabs in gui folder I think.

Thanks for the reply, actually I think it is just done using "set as parent" in the GUI Editor.

In Gui editor:
1. Make tabs.
2. Make regions.
3. Select a region.
4. Hover mouse over a tab button.
5. Press Ctrl+P

Now the region will show/hide when that tab button is selected/not selected, no in-game code needed. Pretty nifty, much easier than doing hide/show of each region in code depending on which tab is selected.

Hi yes, this is how it's done, I've just posted code how it's done behind the scenes.