Sets or gets a checkbox's value.
The value property is not related to whether the checkbox is checked or
not. To determine the checked status of a checkbox, use the checked
property.
The value property is used for storing a value that is associated with
the checkbox.
It is not considered when evaluating the checkbox's validity
and it does not trigger an onChange event when the value is modified.
Even if a checkbox is connected to a dataset, its value property
is not related to the value of the collection field it is connected to.
The field's value is determined by the checkbox's checked property.
Note: Changing a checkbox's value in code does not trigger an onChange event.