[Overview][Constants][Classes][Procedures and functions][Index] | Reference for unit 'ExtDlgs' (#lcl)

# TCalculatorDialog.OnChange

OnChange - event handler for any change in the calculator.

## Declaration

Source position: extdlgs.pas line 181

`published property TCalculatorDialog.OnChange : TNotifyEvent read FOnChange write FOnChange;`

## Description

OnChange is a TNotifyEvent property used as the event handler signalled when the value for the calculator dialog is changed. OnChange is signalled from the Change method when the calculator dialog returns a modified value for the Value property.

Applications must implement an object procedure using the signature in TNotifyEvent to respond to the event notification.

## See also

TCalculatorDialog.Change |  | Change - software emulator for the OnChange event ???
TCalculatorDialog.Execute |  | Creates, configures, and displays the form for the calculator dialog.
TCalculatorForm |  | Implements the form used to display a calculator for a TCalculatorDialog instance.
TNotifyEvent