In Flex, how do I create a CheckBox that can't be un-checked?

In Flex, how do I create a CheckBox that can't be un-checked? I run a function when the checkbox is clicked. If that function encounters an error, I want the state of the checkbox to remain the same. How do I do tha开发者_如何学Pythont?

You can use the enabled attribute to prevent the checkbox from being accessed once it's in the state you mentioned.

onFunctionError():void {
    yourCheckbox.enabled = false;
}