Sybase Open Client provides customer applications, third-party products, and other Sybase products with the interfaces needed to communicate with SQL Anywhere and other Open Servers.
You should consider using the Open Client interface if you are concerned with Adaptive Server Enterprise compatibility or if you are using other Sybase products that support the Open Client interface, such as Replication Server.
You can develop applications in C or C++, and then connect those applications to SQL Anywhere using the Open Client API. Other Sybase applications, such as OmniConnect or Replication Server, use Open Client. The Open Client API is also supported by Sybase Adaptive Server Enterprise.