Features of the ByteArray class
Read and write binary data from a disk.
Conversion between unicode string (OLE string - VBA, VBScript, Jscript) and any code page (ConvertCodePages).
Conversion from/to any code page (charset). See list of available charsets at ConvertCodePages page and CharSetConvert method.
Hi-speed binary-to-hex, hex-to-binary, string-to-hex and hex-to-string conversion algorithm (usable to store binary data with SQL statement, HexString property)
Hi-performance Base64 decoder and encoder (binary-to-Base64 encode and decode)
Other features

Process up to 2GB of data
Works also with very large files (>4GB, block-by-block)
Samples to download very large files (Download of large files in ASP)
Samples to accept very large PUT request (ByteArray - accept very large data in POST/PUT request, ASP, VBScript)
Part of ScriptUtilities and Huge ASP file upload, you will get more functionality!
C++ source code is available with Distribution license, please see License page for ScriptUtilities and Huge ASP file upload