Microsoft® JScript®
FileSystemObject Object
 Scripting Run-Time Reference 
Version 2 

See Also                   Methods                    Properties

Provides access to a computer's file system.
y = new ActiveXObject("Scripting.FileSystemObject")
The following code illustrates how the FileSystemObject is used to return a TextStream object that can be read from or written to:
var fso = new ActiveXObject("Scripting.FileSystemObject");
var a = fso.CreateTextFile("c:\\testfile.txt", true);
a.WriteLine("This is a test.");
In the example code, the ActiveXObject object is assigned to the FileSystemObject (fso). The CreateTextFile method then creates the file as a TextStream object (a), and the WriteLine method writes a line of text to the created text file. The Close method flushes the buffer and closes the file.