Using the State and Notifications Broker for VoIP Application Development (Windows Embedded CE 6.0)
1/6/2010
The State and Notifications Broker API is used as a notification framework. Applications register with the State and Notifications Broker in order to be notified of changes to specified registry settings. For more information about the State and Notifications Broker, see the topic "State and Notifications Broker" on MSDN.
The IP Phone Suite Registry uses the State and Notifications Broker. For example, Phone Application needs to be notified whenever the phone lock status changes. The Phone Application can register through the State and Notifications Broker for notification when the "lock status" value in registry key HKEY_LOCAL_MACHINE\System\State\VoIP\ is changed. For more information about the IP Phone Suite registry settings that are monitored through the State and Notifications Broker, see IP Phone Suite Registry Settings.
Using the State and Notification Broker for VoIP Phone Appplications
When developing your application, you must add the sysgen variable SYSGEN_STATE_NOTIFICATIONS to the target project.