File dialog functions

These functions present dialog boxes for requesting new and old files according to platform conventions.

request_old_file([prompt = string] [, default_dir = DirRef])
Prompts the user for an existing file. Returns a FileRef object, or None if the user cancelled.
request_new_file([prompt = string] [, default_dir = DirRef] [, default_name = string])
Prompts the user for a new file. Returns a FileRef object, or None if the user cancelled.