BinaryIO was designed to read, write and edit binary files on the Mac and the PC. Any file that is not a plain text file - for instance a PowerPoint file, Microsoft Word file, sound, image or application, is a binary file.
Director's built-in FileIO Xtra was designed to work with text files. You cannot use it to successfully read binary files because data in the binary file will look like formatting characters to FileIO. For instance if FileIO hits numToChar(0) in the data, it interprets that as an end-of-string character and won't read past that point. BinaryIO contains many methods for reading and converting data values. These methods aid in creating or reading media files to conform to a file specification.
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