Adobe Extending Flash Professional CS5 - Manual (Page 299)

277 EXTENDING FLASH PROFESSIONAL
FLfile object
Last updated 5/2/2011
Description
Method; writes the specified string to the specified file (as UTF-8). If the specified file does not exist, it is created.
However, the folder in which you are placing the file must exist before you use this method. To create folders, use
FLfile.createFolder() .
Example
The following example attempts to write the string "xxx" to the file mydata.txt and displays an alert message if the write
succeeded. It then attempts to append the string "aaa" to the file and displays a second alert message if the write
succeeded. After executing this script, the file mydata.txt will contain only the text "xxxaaa".
var URI = "file:///c|/temp/mydata.txt";
if (FLfile.write(URI, "xxx")) {
alert("Wrote xxx to " + URI);
}
if (FLfile.write(URI, "aaa", "append")) {
alert("Appended aaa to " + fileURI);
}
See also
FLfile.createFolder() , FLfile.exists()