Using Service Broker (SQL Server Express)
Service Broker is a new technology in SQL Server 2005. It helps developers create distributed applications that provide support for queuing and reliable messaging. Developers can compose applications from independent, self-contained components called services. Applications can then use messages to interact with these services and access their functionality. Service Broker uses TCP/IP to exchange messages between SQL Server instances, and includes features to help prevent unauthorized access from the network and to encrypt messages sent over the network.
Microsoft SQL Server 2005 Express Edition (SQL Server Express) database engine supports Service Broker only with a different edition of SQL Server 2005, such as Workgroup, Enterprise or Developer edition. Service Broker functionality is not supported between two editions of SQL Server Express.
For more information about Service Broker, see Service Broker in SQL Server 2005 Books Online.