All of the functions in the file I/O API are methods of the DWfile object. Optional arguments are enclosed in curly braces ({ }). Functions added for Dreamweaver 3 have an availability of 3.0. Functions with an availability of 2.0 were included in the version of DWfile that was supplied as a download for Dreamweaver 2 from the Macromedia web site. This version of DWfile may have been installed with some third-party objects.