I have written an simple applications in C++, and I need to connect with any RIA just for viewing the process ... is there is any good RIA based on C++
Qt is a good, popular cross-platform GUI library for C++.
I don't know whether it matches your definition of "RIA", though.
Have you looked at Qt? It comes with Webkit built-in. It is also more portable than other RIA implementations. BTW, most RIA implementations run on language virtual machines that are in turn implemented in C or C++ :-)
Silverlight is the nearest framework for you. You may find this Stackoverflow question interesting.
Update
After seeing your comment, I'd recommend you using ISAPI or CGI programming in C or C++
Update 2
After figuring that you need to execute C++ code from browsers, The answer is ActiveX. But portability is an issue, rather.
Generally speaking, this is difficult to do. Clients don't trust running arbitrary C++ code from the internet, because people don't want every website under the sun to be able to install malware, and generally hijack the entire machine, every time they visit a web site. In the general case, therefore, what you want is not really possible.
If you're willing to require the user to answer a ton of prompts, and are okay restricting your application to Internet Explorer on Windows, you could familiarize yourself with COM and write an ActiveX control.
I would strongly advise against doing so, however.