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

# TBasicAction.Change

Calls the OnChange handler.

## Declaration

`protected procedure TBasicAction.Change; virtual;`

## Description

Change calls the OnChange handler if one is assigned.

Application programmers should not call Change directly. It is called automatically if a property of an action component changes.

Descendent classes of TBasicAction should call explicitly call Change if one of their properties that affect client controls changes its value.