Techniques for WCAG 2.0

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FLASH29: Setting the label property for form components

Important Information about Techniques

See Understanding Techniques for WCAG Success Criteria for important information about the usage of these informative techniques and how they relate to the normative WCAG 2.0 success criteria. The Applicability section explains the scope of the technique, and the presence of techniques for a specific technology does not imply that the technology can be used in all situations to create content that meets WCAG 2.0.


This technique relates to:

User Agent and Assistive Technology Support Notes

See User Agent Support Notes for FLASH29. Also see Flash Technology Notes.


The objective of this technique is to explicitly associate a form component with its label text by setting the component's label property. Setting this property will visually place a label next to the component, and exposes the label text to assistive technology.

Components that support the label property are:

For other components, the label text has to placed adjacent to the form component manually. For these components, the label text can be associated with the form component using one of these approaches:


In order for these form controls to be accessible to assistive technology, the following lines of code will have to be added once to the movie's script:

When the Button component is used:

import fl.accessibility.ButtonAccImpl; ButtonAccImpl.enableAccessibility();

When the RadioButton component is used:

import fl.accessibility.RadioButtonAccImpl; RadioButtonAccImpl.enableAccessibility();

When the CheckBox component is used:

import fl.accessibility.CheckBoxAccImpl; CheckBoxAccImpl.enableAccessibility();

Example 1: Setting the label using the Component Inspector panel

  1. Add the Button, CheckBox or RadioButton component to the movie by dragging it on the the stage from the 'Components' panel.

  2. With the component selected, open the 'Component Inspector' panel by selecting it in the 'Window' menu or using the Shift + F7 shortcut.

  3. In the Component Inspector, under the 'Parameters' tab, enter the label text for the 'label' parameter.

The screenshot below illustrates this technique.

Setting a component's label in the Component Inspector Panel

Example 2: Setting the label on a Button, CheckBox and RadioButton component using ActionScript 3.0

Example Code:

import fl.accessibility.ButtonAccImpl
import fl.accessibility.CheckBoxAccImpl
import fl.accessibility.RadioButtonAccImpl
import fl.controls.Button;
import fl.controls.CheckBox;
import fl.controls.RadioButton;

var myButton: Button = new Button();
myButton.label = "Submit Details";
myButton.x = 10;
myButton.y = 10

var myCheckBox: CheckBox = new CheckBox();
myCheckBox.label = "notify me";
myCheckBox.x = 10;
myCheckBox.y = 40

var myRadioButton: RadioButton = new RadioButton();
myRadioButton.label = "Male";
myRadioButton.x = 10;
myRadioButton.y = 60;

This technique is demonstrated in the working example of Setting the label on a Button, CheckBox and RadioButton component using ActionScript 3.0. The source of Setting the label on a Button, CheckBox and RadioButton component using ActionScript 3.0 is available.



When the Button, CheckBox or RadioButton components are used:

  1. confirm that labels describing the purpose of the button have been provided through the component's label label property.

Expected Results

  1. #1 is true

If this is a sufficient technique for a success criterion, failing this test procedure does not necessarily mean that the success criterion has not been satisfied in some other way, only that this technique has not been successfully implemented and can not be used to claim conformance.