Without using the terms "object" or "bound", describe what you need to do.
In other words, what real-world result do you seek? A check box is a
control, not an object. A bound form (a form is a database object) has a
table (or query) as its record source. A control such as a text box or
check box on that form may then be bound to a field in the record source
table. If a text box is bound to a table field, what you type in the check
box will be stored in the field to which that text box is bound. If a check
box is bound to a yes/no field in the table, checking the box will cause Yes
(or 0, which is the equivalent of Yes in a Yes/No field) to be stored in
that Yes/No field. Checking a box can cause other things to happen (things
to be hidden or unhidden, for instance) if you have added the correct code
to the check box's After Update event.