Also, using just the code Khalid_Afridi has posted, once the button is clicked the controls on all records will be editable until the form is closed and then re-opened, which defeats the whole purpose of the exercise!
As Paul suggested, in code (not in the Properties pane) in the Form_Current event
Me.AllowEdits
needs to be set to
False.
Then in the Button_Click event
Me.AllowEdits
needs to be set to
True.