Id
This property allows you to assign a unique ID to the Combo-Box control.
This is the information the variables event-control-id and control-id refer to. Both variables are defined in iscrt.def.
 
Example - Create a combo-box in screen section with an ID
screen section.
...
03 screen-1-co-1 Combo-Box
   line 19.0
   column 23.0
   size 12.0 cells 
   lines 11.0
   id 13
   3-d
   drop-down
   .