When a Tab is disabled, the user cannot select Tabitems anymore, and any child controls
Tab.enabled read/write property
Get or set the tab ability to respond to mouse, and any other events. When set to false, disable the Tab (the user will not be able to interact with it), and tab's events won't be fired anymore.
Example
local ui = require "ui"
-- create a simple Window
local win = ui.Window("Tab.enabled sample", 314, 214)
local tab = ui.Tab(win, {"I'm disabled :(", "Item 1", "Item 2"})
local cb = ui.Combobox(tab.items[1], {"Item1", "Item2", "Item3"})
tab.enabled = false
win:show()
-- update user interface
repeat
ui.update()
until not win.visible