isCOBOL Evolve : User Interface : Controls Reference : TREE-VIEW : Properties : Enabled
Enabled
This property assumes a value of "0" if the Tree-View control is disabled, "1" if it is enabled.
 
Example - Define a tree-view initially disabled and enable it later
screen section.
...
  03 screen-1-tv-1 Tree-View
     line 2.7
     column 3.4
     size 20.8 cells 
     lines 29.1 cells 
     color 144
     enabled 0
     id 2
     no-box
     .
...
procedure division.
...
  modify screen-1-tv-1 enable 1
...