Update TextArea with an ActionScript function when clicking the Button

   
<?xml version="1.0"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml">
    <mx:Script>
        
        public function handleClick():void {
            text1.text="A";
        }
      
    </mx:Script>
    <mx:Button id="button1" label="Click here!" width="100" fontSize="12" click="handleClick();" />
    <mx:TextArea id="text1" />
</mx:Application>

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Update TextArea with an ActionScript function when clicking the Button : TextArea « Components « Flex

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