' Step 2: Connects the event sink interface to a class ' Step 1: Defines an event sink interface (ButtonEvents) to be Public Delegate Sub ClickDelegate(x As Integer, y As Integer) The unmanaged client creates an instance of the Button class and implements the event sink interface.

The managed server declares ButtonEvents as an event sink interface and connects the interface to the Button class. The following example shows a Managed Server as the event source and a COM Client as the event sink. Then use the connection point mechanism to connect the sink interface to the event source.

Implement the event sink interface in COM.įor COM clients that sink events, implement the event sink interface defined by the event source in its type library.

Use Tlbexp.exe or an equivalent API to export the assembly.

Export the assembly containing the class to a type library.

Apply the ComSourceInterfacesAttribute to connect the event sink interface to the managed class.

This interface can contain a subset of the events sourced by a managed class.

Define the event sink interface in managed code.

(Visual Basic hides connection point details, so you do not have to call these methods directly.) With these modifications, a COM client can register its event sink interface in the traditional way by calling the IConnectionPoint::Advise method. When the sink is a COM client, the source must include additional elements to simulate connection points. NET Framework provides a delegate-based event system to connect an event sender (source) to an event receiver (sink). For specific details that apply to this topic, see Raising an Event in the same section. NET Framework, see Handling and Raising Events. If you are not familiar with the delegate-based event model provided by the. If you can confirm this and want to email me to let me know and I’ll give you credit on this page. I am unable to confirm that the VB listings work as they should (though I am confident that they do). Additionally, I found it a pain that the MSDN article neglected a C++ ATL COM client listing, so I added one here for those who prefer it. Other than that explanation, the information here is a rip of the information in the Raising Events Handled by COM Sink article, with the appropriate modifications made to it. If you are looking for an explanation as to why this works and the MSDN article, Raising Events Handled by COM Sink, does not, please refer to this document. This document correctly outlines how to use COM Interop to sink.

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