actionscript - How to read and write a text file in ActionScript 2.0 (Macromedia Flash 8)

Question

I'm making some Animation project with Macromedia Flash 8, which uses ActionScript 2.0. I need some simple options like to save user to text file and read it. But, I couldn't find about writing to text file. Found some code that reads, but not writes.

Example of reading:

loadText = new LoadVars();
loadText.onData = function(raw) {
    myField.text = raw;
}
loadText.load("user.txt");

Can someone help me, with examples of writing, parsing read data. Shortly, Working External data.
I appreciate any help that you can provide.