Data exchanging between Action Script and FFish Script

We often need to exchange data between Action Script and FFish Script if we use asynchronous fscommands to call FFish scripts in Action script. In the section "Add more functions to your application" we discussed a sample about saving game scores. The "score" variable for a player is defined in FFish Script, how can the Flash movie access the variable to update the score of the player? SWFKit provides the following tree ways.