Is there something specific you wish to accomplish?
Forms controls do not, in themselves, have values.
They display values.
If the check box is not bound to a table field, they do not carry over
any value anyway, so there is no need to do anything. When you re-open
the form, the check box will display whatever it's default value is.
If the Check box is bound to a table field, you wouldn't want it to
lose it's value, would you?