This variable is used on character-based hosts to specify the color and video
attributes of the characters used to form the border (box) around the active
floating window. ACTIVE_BORDER_ COLOR can be set to a variety of numeric values that express
combinations of color and video attributes.
If ACTIVE_BORDER_COLOR is set to "0", the active window's border is drawn with
the colors and video attributes specified in the COBOL program when the window
is initially created. The default value is "0".