Auto Expand property

This is where you can specify that when the combo box field is left, the value filled in by the user will be expanded to the first matching value from the list. If no matching value is found, the string itself is taken as new value. The Default value for this property is No, meaning that no expansion will be performed. Note that this property will only work for a Combo Box (i.e. 'Check List' property set to No).