Hosting Account Support for DLLs (Dynamic Link Libraries)
Our Windows hosting supports ASP.NET application DLLs only. Further, DLLs that require registration with IIS are disallowed. DLLs must be uploaded to a bin directory within an application root on your hosting account.
For more information on setting up a hosting account custom directory, see the following articles:
Managing Your Hosting Account's Files
Customize IIS settings