The data you see displayed in windows comes from entries users make in windows or from tables that are part of the application. Users can change information in a window without affecting data in tables. Information in a window is maintained until the form containing the window is closed; opening or closing a particular window doesn’t change information displayed in a window.
Scripts are used to move information from the fields in windows to the fields stored in tables. Dexterity provides special sanScript commands that make moving data between windows and tables much easier.