PropertyHandle :: SetInstanceEventHandler - Set Instance Event Handler

Instance event handlers can be used as an alternative way to handle server notifications independent on implemented context classes. To be notified from the server the property handle must be registered on the server ( RegisterPropertyHandle ().

When setting event handlers in addition to a context class handler function, the context class handler is executed prior to the application handlers. When the context class handler returns an error ( YES ), the application handlers are not executed. Execution of application handlers is also stopped, when the first application handler returns an error ( YES ).

The event handler is passed as an event link that consists of an event handler function and a class instance. The handler is called later with the instance of the event handler class set in the event link.

When adding several instance event handlers, they are called in the sequence as being added to the property handle. Handlers can be removed using the ResetInstanceEventHandler () function.