RTCE_REGISTRATION_STATE_CHANGE events have an IRTCRegistrationStateChangeEvent interface. This type of event is fired when a registration changes state.
When the application's implementation of the IRTCEventNotification::Event method indicates an RTC_EVENT of type RTCE_REGISTRATION_STATE_CHANGE, the method's pEvent parameter is an IDispatch pointer for the IRTCRegistrationStateChangeEvent interface.
Note You must call the IRTCClient::put_EventFilter method and set an event filter mask that includes the RTCE_REGISTRATION_STATE_CHANGE event to enable reception of registration events. If you do not call IRTCClient::put_EventFilter, your application will not receive any events.
Methods in Vtable Order
The IRTCRegistrationStateChangeEvent interface inherits the methods of the standard COM interface IUnknown.
In addition, IRTCRegistrationStateChangeEvent defines the following methods.
|get_Profile||Returns the profile associated with the registration that changed state.|
|get_State||Returns the new state of the registration.|
|get_StatusCode||Returns the result code associated with the state change.|
|get_StatusText||Returns the status text associated with the state change. If no status text is available, the method fails and returns E_FAIL.|
Client: Requires Windows XP.
Server: Requires Windows Server 2003.
Redistributable: Requires Rtcdll.dll on Windows 2000, and Windows Me/98.
Header: Declared in Rtccore.h.
Library: Included as a resource in Rtcdll.dll.
GUID: IID_IRTCRegistrationStateChangeEvent is defined as 62d0991b-50ab-4f02-b948-ca94f26f8f95.