Parsing a multipart form

I have successfully uploaded a multipart form containing some text objects
and a binary file.  They come as part of a contiguous stream.

Is there an example of how to parse this multipart form stream?  After
searching the Internet it seems that the TidMessageDecoderMIME could be used
to perform that function but I was unable to find an example.  If it is
right component to perform the parsing function a snippet of code would be
appreciated, if someone has one.

Thanks.

David