<doc>

<legacy_id></legacy_id>

<name>backKey</name>

<type>message</type>

<syntax>

<example>backKey</example>

</syntax>

<synonyms>

</synonyms>

<summary>Sent to the current card of the defaultStack when the hardware back button is pressed.</summary>

<examples>

<example><p>on backKey</p><p> answer &quot;You pressed the back key&quot; with &quot;Okay&quot;</p><p>end backKey</p></example>

</examples>

<history>

<introduced version="5.0.1">Added.</introduced>

<deprecated version=""></deprecated>

<removed version=""></removed>

</history>

<objects>

</objects>

<platforms>

<android/>

</platforms>

<classes>

<mobile/>

</classes>

<security>

</security>

<classification>

<category>User Interaction</category>

</classification>

<references>

<message tag="searchKey">searchKey Message</message>

<message tag="menuKey">menuKey Message</message>

</references>

<description>

<overview>Handle the <b>backKey</b> message to perform an action when the back button is pressed.</overview>

<parameters>

</parameters>

<value></value>

<comments>The <b>backKey</b> message is sent to the current card of the <property tag="defaultStack">default stack</property> when the hardware back button is pressed.<p></p><p></p><note>If this message is passed or not handled, then the engine automatically quits.</note></comments>

</description>

</doc>