Notify-Mouse
When this style is set, the Combo-Box control fires the following events: MSG-MOUSE-ENTER, MSG-MOUSE-EXIT.
 
Example - Define a chips-box in screen section that fires mouse events
screen section.
...
  03 screen-1-chip-1 Chips-Box
     line 19.0
     column 23.0
     size 12.0 cells 
     lines 11.0
     id 13
     notify-mouse
     .