By DDE, do you mean Dynamic Data Exchange, which is a Microsoft Windows-specific technology for making applications communicate with each other?
Can you explain exactly what your goal with this is? How to you want your application and Eclipse to communicate?
As far as I know, Eclipse does not support DDE, because Eclipse is a platform-independent Java program and it would not make sense for it to support this Windows-specific technology. The standard Java API also does not contain anything to support Windows DDE.
If you explain why you want this, then someone could maybe help you with more Java-like way to solve the problem. [ November 05, 2007: Message edited by: Jesper Young ]