Border-Width
This property allows you to set or retrieve the width of the four borders of the GRID control. The property is a list of four values that specify the width in pixels of the top, left, bottom and right border respectively. The border width is applicable only to controls with the Boxed style.
 
Example - define a grid with a huge left border
screen section.
...
  03 screen-1-gr-1 Grid
     line 7.6
     column 5.8
     size 28.2 cells 
     lines 19.8 cells 
     border-width (1 5 1 1)
     .