Bill,
Usually, you would need to designate some "rule" for locking your
records. For example, if a certain field is not Null, then lock the record,
or... for another example, if a checkbox named Locked is True then lock the
record.
Using the OnCurrent event for the form, the easiest way is to lock the
whole record is to set the Allow Edits property to False.
hth
Al Camp