function
| Library: Base64 encoding and decoding (OMENC64 legacy) Include: omenc64.xin | 
define string function Decode64
                 value      stream Chars-In
   with-sequence value      stream EncodeSeq optional
   status        modifiable switch Status    optional
Argument definitions
You can use this function to convert encoded Base64 data into the original data. You can use this function to convert incoming 64-character-set data into binary data (255-character-set data) when processing incoming email attachments (for example, binary files) or sections.