I'm using a C# MailMessage to attach a wave file (8K) to an email message. I'd like to provide a player within the body of that email message that will play that wave file if the user chooses to do so. I've tried using the embedded <object> version of WMP, and a cid: reference to the file, but Outlook 2003 rejects the object tag and won't run it. If it helps, I know my users will be on Outlook 2003.
If you know the message recipients are running Outlook (which implies you're using this internally), you might be able to accomplish something even better by incorporating your player controls into a custom Outlook form.