[Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] | Reference for unit 'Classes' (#rtl)

# TCollectionNotification

Collection change notification enumeration.

## Declaration

Source position: classesh.inc line 519

`type TCollectionNotification = (`
`cnAdded,` |  | An item is added to the collection.
`cnExtracting,` |  | An item is extracted from the collection.
`cnDeleting` |  | An item is deleted from the collection.
`);`

## Description

TCollectionNotification is used in the TCollection class to send notifications about changes to the collection.

Documentation generated on: May 14 2021