[Newbies] Base64 conversion for images

Hi,

I want to transfer thumbnails as one part of some more structured data via XML. I thought about embedding the thumbs encoded in Base64 directly into the XML file rather than transferring them separately.

How can I decode the string from within the XML file to use and display the thumbs in Squeak (they are either gif, jpg or png). I had a look at Base64MimeConverter but couldn't quite figure it out

Another use case is converting thumbs on my hard drive to a Base64 string (i.e. encoding...). From a FileStream..?

I guess Base64MimeConverter is the right thing. Is there some documentation on how to use it?

Thanks, matsch