Height-In-Cells
This style implies that the value specified for the Lines property, the one setting the Bar control’s height, is expressed in CELLS. It is possible to get the same result writing: "Lines value CELLS".
 
Example - Define a vertical bar on the screen section definition expressing height in cells
screen section.
...
  03 screen-1-br-3 Bar
     line 10.0
     column 5.0
     lines 22.0 
     id 3
     height-in-cells
     .