OK - If you want a WCF service, I'd strongly urge you to implement the service in.Net and publish it with IIS. I'd urge you to forget about MFC. Especially if you're considering Windows Tablet 8. Or Apple iPad! For truly portable tablet clients, I'd strongly urge you 'think HTML5' and look at a framework like AppCelerator Titanium or PhoneGap:. Finally, if you want your WCF service (or any.Net functionality) to 'communicate with the internals of your C program', you've got lots of choices. Including 'Interop': declaring an external reference and simply making a subroutine call into your unmanaged (C) code:.
Windows Communication Foundation (WCF) is a framework for building service-oriented applications. Using WCF, you can send data as asynchronous messages from one service endpoint to another. A service endpoint can be part of a continuously available service hosted by IIS, or it can be a service hosted in an application.
IMHO.
WCF is mainly used for developing the distributed system. Advantages of using WCF 1. Interoperability 2. Scalability 3. Enhance security and reliability compare to ASMX (Web services) Below are the topics which are important in WCF Services for beginners and for experience as well. Here is the collection of a wide range of topics in WCF Services. This WCF Service tutorial includes Sample Code in C#, Configuration Steps, Videos, and theory.
Step by Step WCF Service Tutorial for Beginners. Message Exchange Pattern. One Way Message Pattern. Duplex Message Pattern. Tracing and Message Logging. Introduction to OData. Authentication in WCF.
WCF- Security. JSON using WCF. Jquery with WCF.