Hi, Craig.

>This is very similar to things we're looking at with a large C++ application with a 10 year history. We're looking at moving it to .NET, but with an app this large and old, a total rewrite is out of the question. I haven't found much information on this type of interop.

I've just spent a couple days with people from the VC++ 2005 team, and if you have enough time to wait for the final release (although you can start researching the betas now) I think this is an extraordinary chance to revamp a C++ application. The new version will not only improve your programs with a simple recompilation (due to a lot of compiler optimizations, safer libraries, etc) but will help you to make your code become better, more secure, and then update it with newer technologies (whether it is unmanaged or managed code).

The new version will allow you to do things like quite simply integrate MFC applications with WinForms user controls and switch back and forth between legacy unmanaged code and managed code with all the CLR advantages.

If you want to take a look, I can send you some of the information. I as really impressed with some of this stuff.

Best luck!