Extracting an attachment from an "Outlook Item" - .EML file??

Hello. I am in the process of developing a windows service that will check an email server every 15-30min. I have not found an elegant solution to this problem as of yet. I know there is not a clean way to receive email with VB .NET. If you know of one, please let me know. Now, I am physically dragging my emails to a local folder. The problem is that it is not clear how to extract the .zip file from the .eml file that outlook creates with in VB .NET. Physically, I would simply open the email file and double click on the .zip file... save to disk... and extract. I would LOVE to have this automated. If you could help me with the extraction of the .zip file, I would appreciate it.

Thanks,
brazilnut