Unlock : Unlock the form to make any change by any user. Because information in this form is very useful and critical, so accidental changes are not acceptable and normally form is lock for changes.

To unlock the form, user should press this button, After pressing, button's caption changes to Lock and it can lock the form again.

When a change is saved, the button automatically changed to Unlock again and two fields on the General Page show the last modification Date & User :



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