If I understand your question correctly, I think you are going to need to do some additional development work. Sounds like you have a custom app that you have built and now you want to pipe or redirect the text in an MSN Messenger chat window into your sample app. You can do this but it requires you to turn your sample app into a full-blown MSN Messenger client. To do this, you will need to first obtain the Exchange 2000 SDK, which includes an Instant Messaging SDK. The IM SDK includes everything you need to build your own IM client. You can download the IM SDK from http://msdn.microsoft.com/exchange.
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