The keyable length + 1 + pad if not even
Up to 255
Text for items in the list
Allows a text item to be entered by a user or chosen from the list. The value in the field is a string.
The items in the list are specified by the data type definition or at runtime, using the add item statement. Items added at runtime aren’t saved in the application dictionary; they must be added each time the application is run.
The change script for a combo box field runs each time a new value is chosen in the list, including each time the up or down arrow key is pressed to move to a different value.