With Level C of the Island Hopper News sample, you can browse and place ads using a Web client to access the database where the classified ads are stored. You must establish a customer account with a login and password before you can browse or place ads. You can use a Windows client to maintain customer records, invoices, and payments. Level C adds the concepts of billing and security to become an application suitable for the Internet.
Level C consists of a database to store the classified ads, several COM components that encapsulate business and data access processing, a Windows client, and a Web client.
This following table lists information contained in this section.
| Section | Description |
| Level C — Database Schema | Describes the SQL Server database used to store the classified ads. |
| Level C — Business and Data Access Components | Describes the COM components that handle the business and data access processing. |
| Level C — Windows User Interface Details | Describes the details of the Windows client. |
| Level C — Web User Interface Details | Describes the details of the Web client. |