Need help with AS 3.0 save high score as .text (.txt) format

programming flash
1

[FONT=arial]I need one game like after finishing all [/FONT][FONT=arial]we need to able to save high score as .text (.txt) format with the file name (swf name)
saving shud be auto saving
without showing** save dialog box**.
[/FONT]

plz help me