I've got a COM server that supports two-way communication. A COM client can call the services in the COM server and the COM server can also call interfaces in the COM client.

Now I want to replace the COM client with a Visual Basic client. I've figured out how to make calls from the VB client to the COM server through automation but how do I write the VB client so that the COM server can make function calls to the VB client? Can someone point me to a code example? Thanks.