This is more of a comm-dev-forum question...
You can probably roll your own multi-part MIME encoding and decoding pretty
easily. Have a look at the Memo Pad sample code - it uses multi-part MIME
for beaming categories.
You have two more problems to solve. First, you need some way to get the
"helper" app to generate the object to attach (and maybe some way to select
the object to be attached). Second, you need some way to deliver the
received attachment to the appropriate "helper" app.
MultiMail defines APIs for both of these, which you might be able to take
advantage of.
If you can rely on your users having Palm OS 4.0 or later, you can write
your own exchange library. The user can then use the Send command and select
your exchange library to create an email containing the current record as an
attachment, or add the attachment to an existing email. Attachments in
incoming email can be delivered via the Exchange Manager. It'll take care of
figuring out which application "owns" the object, based on the extension,
MIME type, etc.
If you only want to use your own "helper" apps, you can define (and use)
whatever APIs you want.
--
Danny @ Palm
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