I am working on a feature where the user can add documents to the database. Mostly this is done by browsing to a file (image or office document or PDF file) and then the file is saved in the database. This is working good so far (except I cannot display the office documents in the VFP form itself, but I dropped that idea).

I think it would make sense to be able to add emails as well, but that seems to be more complex. The easiest way of course is if the user saves the email message as a file, and then browses to that file in the application.
To make it more integrated, I could use office automation to browse the email messages when the client uses Outlook, but they might use Lotus Notes and that complicates issues. I was wondering if it would be an idea to use drag and drop where the user could drag an email message to the form, either from Outlook or from the file system, but I have never done drag and drop from other applications. I am a little bit undecided and would appreciate any comments or ideas.