I found few sample codes too ! but I have difficulty in following the code.

If you've been following some threads here, you probably have seen the classical Watching long-running processes through CGI being mentioned.  You could try to implement something along these lines, and in case you get stuck, come back here with the code you've tried and what exactly didn't work.

That would be for Unix systems. I can't comment on how to achieve the same on Windows, because I've never run a webserver on Windows for anything serious. But I suspect the system differences with respect to fork/exec and how the webserver handles its pipes to the CGI program might be large enough to require a slightly different approach... Hopefully, someone else knows more.