As I mentioned in the question, What is the difference between DDE & WCF & WMI & WFP? and when should I use eachone. I searched alot in google but I didn't get the point.
Is there any intersection or common functions between them?
DDE is an old model used for Inter-Process Communication in Windows.
WCF is a .NET framework for building network applications.
WMI is a extension to the Windows Driver Model which allows getting notifications or information about hardware.