Changes the current selected tab in the specified tab bar gadget.
SetTabBarGadgetState( Gadget.i, State.i )
Gadget
A valid number of a tab bar gadget. State
The position of the tab (the first tab is on position 0) or
the unique ID (see also TabBarGadgetItemID) of the tab or
one of the following constants:
#TabBarGadgetItem_Event
The tab with the last event. #TabBarGadgetItem_None
Select no tab.
None