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3. Entry and Navigation > 21. Let Users Add Custom Items to Predesigned Lists

Let Users Add Custom Items to Predesigned Lists

Avoid forcing choices to existing list items only by adding a procedure to handle new values.

Users often choose items from an existing list via a combo box on a form. Sometimes, however, a user might need to enter into the combo box a value that isn’t on the list. This can happen, for example, when the user is working with a new customer that he has not yet appended to a customer table, or when the user is correcting an existing list item that is misspelled.

The Limit To List property controls whether a new value is allowed entry in a combo box. If this property is set to No, users can enter new values into the combo box. This is fine, but with one caveat: if the new value is meant to become a permanent member of the list, just typing it into the combo box doesn’t add it to the list.


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