Tab-To-Add
When this property is set, a new Tab is added to the Tab-Control control. The value of this property represents the title of the new Tab.
Multiple Tabs can be added at the same time, by enclosing their titles between parentheses.
 
Example - Add one page to a tab-control
...
procedure division.
...
  modify screen-1-tc-1 insertion-index 2 
         tab-to-add "Other Page" 
...