A while back, in order to get some code to compile, I had to update PtrToStringChars (found in vcclr.h) to work in the new Whidbey C++.

In case anyone wants this, I've posted my implementation (and a small main() to drive it) here: p2sc.zip.

Keep in mind: this is my personal implementation, and not necessarily the same one that will be shipped with Whidbey.  However, if you're looking for a solution, it should work for you.