To display a traffic light in a screen, put a icon/ i/o field (display only) on the screen.
Say my screen has an icon element ICON_GREEN_LIGHT
Now in my Top include create a data elemnt like
Data:ICON_GREEN_LIGHT(4) type c.
and in PBO assign the value as:
ICON_GREEN_LIGHT = '@08@'." Green light; positive
Check type-group ICON for the 4 char string
