Required field Error message

          

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
    <mx:Validator id="surnameV"
        required="true" 
        source="{surnameTxt}" 
        property="text"
        requiredFieldError="Your Surname is a required field."/>
            
                
    <mx:Form id="myForm">
        <mx:FormItem label="Insert Surname" required="true">
            <mx:TextInput id="surnameTxt" />
        </mx:FormItem>      
        
    </mx:Form>
    
</mx:Application>

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Required field Error message : Validator « Development « Flex

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