Today I got yet another request from inside Microsoft about when our code coverage utilities will work for native C++ code.  I've been asked the same question by customers several times.  And of course my answer is always "Now".  Although the unit test framework is aimed squarely at the managed world, the coverage infrastructure was built to support native and mixed x86 binaries, as well as managed code.  Currently we don't support x64 or device drivers.  Simlarly we don't support devices either.  But if you have been wanting to find out exactly how much code coverage you get from some of your manual or automated tests for native systems, go use my Off-Road article to see how it is done.