How to write a text file in Acrobat Javascript

I am using acrobat XI I have tried output a text file like this

var cMyC = "abc";
var doc = this.createDataObject({cName: "test.txt", cValue: cMyC});
this.exportDataObject({cName: "test.txt", nLaunch:0});

This is working , but I would like to provided a fixed path and no dialog is popup to request the user choose a saving path

Are there any way to fix the problem? thanks