C# RTD + .Net Remoting

[ZawMinTun]

Hi all, I have a problem in creating a Excel RTD Server using C#. The application is laid out as follows: A window application which is running .Net Remoting server on a tcp channel (let's call it DataFeedServer). A dll which can call DataFeedServer to get the data (let's call it DataFeedClient). The communication between those DataFeedServer and DataFeedClient is two-way (using callback functions and delegates). Then I tried to call the DataFeedClient dll from a test windows application (let's call it TestWinApp). Then the application flow is: TestWinApp calls DataFeedClient, DataFeedClient calls DataFeedServer, DataFeedServer fires an event in DataFeedClient and finally DataFeedClient fires an event in TestWinApp. And it's working fine. Then MS Excel comes in for real world scenario. I put a dll for RTD interface which will be called by MS Excel and which will call to DataFeedClient. Then the scenario changed to MS Excel RTD calls DataFeedClient, and DataFeedClient calls DataFeedServer. Then DataFeedServer tried to fire an event of DataFeedClient. But fails. No error. Just silently stopped at that stage. So there's no calling from DataFeedClient back to MS Excel. The direction of the data flow is only half of the route always. I'm not so sure I'm explaining clearly enough and thanks for taking your time this far. Actually, the very essential information I need to know is if it's possible to use IRtdServer and Two-way .Net Remoting (with callback functions and delegates). Any information source is gratefully appreciated too. Thanks in advance. Best regards, Zaw Min Tun