Border-Color
This property allows you to set or retrieve the border color of the Tree-View control. See "Color management" for further details. The border color is applicable only to controls with the Boxed style.
 
Example - Define a tree-view with red border
screen section.
...
  03 screen-1-tv-1 Tree-View
     line 2.7
     column 3.4
     size 20.8 cells 
     lines 29.1 cells 
     border-color 5
     boxed
     id 2
     .
...