Declaring a variable to be used to transfer the value between the current &
new records

In declarations section of the form's module:
 Private worksOrderTemp as String (or whatever type you need)
 Private fgCodeTemp as String

Add these two lines on click of button that takes you to new record.

ButtonNew_Click()
 worksOrderTemp = worksOrder '(use actual name of your works order control)
 fgCodeTemp = fgCode

Add this to Form_Current

Form_Current()
If Form.NewRecord then 'do not change the fields on old records
 worksOrder = worksOrderTemp
 fgCode = fgCodeTemp
Else ' get value from existing record if it is not being changed
 worksOrderTemp = worksOrder
 fgCodeTemp = fgCode
End If

You may want to accomodate the possibility of going to a new record
immediately upon opening the form (in which case both variables would be
null).