This could be promising.

http://runtimecompiledcplusplus.blogspot.co.uk/

Welcome to the Runtime-Compiled C++ blog.

This technique allows you to change your C++ code while it's running.

It uses no scripting, no VM, no external tools - you can apply it to your own code and you can continue to use your favourite IDE.
We think the quit-recompile-restart-reload cycle we're all used to could soon be a thing of the past.

If this is your first visit, watch the teaser video on the left.

If you want to know more, start http://runtimecompiledcplusplus.blogspo ... -live.html

Visual studio actually has this built in, kind of. I remember it being a bit buggy in previous versions and since I haven't tried it in Visual Studio 2010. It's called Edit and Continue but who knows how well it works. Regardless, your link sounds cool.