Mass-Update
Setting this property to "1" inhibits isCOBOL framework to repaint the Combo-Box control every time the program modifies it. This practice is recommended in order to increase performance when a large number of changes are applied to the Combo-Box control. At the end of the process it is necessary to reset the property to its default value of "0" to see the changes.
 
Example - Load three items into a combo-box under mass update
modify screen-1-co-1 mass-update = 1
modify screen-1-co-1 item-to-add "item 1"
modify screen-1-co-1 item-to-add "item 2"
modify screen-1-co-1 item-to-add "item 3"
modify screen-1-co-1 mass-update = 0