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

# TCollection.Changed

Procedure called if an item is added to or removed from the collection.

## Declaration

`protected procedure TCollection.Changed;`

## Description

Changed is called if a change takes place in the collection managed by the class. If the update count ghas reached zero, it calls TCollection.Update with a nil argument.

## See also

TCollection.Update |  | Hander called when an item in the collection has changed.
TCollection.Add |  | Creates and adds a new item to the collection.
TCollection.Clear |  | Removes all items from the collection.