Use Mappoint From Microsoft (Score 0, Informative)

Nobody seem to mention this, but Mappoint is an excellent product from Microsoft and you can do all sorts of stuff with it. It is also affordable. You may try Streets from Microsot, which is cheaper, but Mappoint is the one I admire. You can program it in so many ways.

The product is not free of course, but it is quite cheap compared to other solutions out there. The free solutions also suck, unreliable and totally unsupported. Your best chance is definitely a commercial product like Mappoint, and mappoint is the best solution out there.