The Alert(msg) calling sequence displays a Maplet application that contains a message.  The user can click OK or Cancel. The value returned is true or FAIL, respectively.

The Alert sample Maplet worksheet describes how to write a Maplet application that behaves similarly to this routine by using the Maplets[Elements] package.

The opts argument can contain one or more of the following equations that set Maplet application options.

title = string or symbol

Specifies the Maplet application title.  By default, the title is Alert.

$\mathrm{with}\left(\mathrm{Maplets}\left[\mathrm{Examples}\right]\right)\:$

$\mathrm{Alert}\left(''Invalid\; input!''\right)$