Have code to block Save but how to keep code in workbook without saving the file?

My company has files that are already in use. I don't know too many details about how they work, but somehow saving the file will screw it up and my boss has to go back and reset something or other to correct it. Obviously it's connected to some other software somewhere. The code below will block Save and Save-As. BUT how do I get the file to hold onto the code without actually saving the file after the code is added (since the file shouldn't be saved)?

Private Sub Workbook_BeforeSave(ByVal SaveAsUI As Boolean, Cancel As Boolean)


If SaveAsUI = False Then


    Cancel = True


    MsgBox "You cannot save this workbook."


End If




If SaveAsUI = True Then


    Cancel = True


    MsgBox "You cannot save this workbook."


End If




End Sub