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  4. Create and invoke a validator programmatically in when a user clicks a Button control


  
    
    import mx.validators.ZipCodeValidator;
    private var v:ZipCodeValidator = new ZipCodeValidator();
    private function performValidation():void {
      v.domain = "US or Canada";
      v.listener=myZip;
      v.validate(myZip.text);
    }