Antonio,
My application has been "under revision" for the past year. Now it is tested full time in an actual business where it is used throughout the day, non-stop.
This is the version which is built with Harbour and Microsoft Visual Studio 2013.
Other than the expected bugs from such a large application ( EXE files run about 10 MB in size ), and such massive internal optimization, it is running quite well. My client is very happy with the performance, and soon we will put it into far more companies.
I'm glad we made this shift. I have a parallel build using xHarbour ( .com ) for compatibility with older ADS systems, and it runs perfectly also. However, I think Visual Studio is still the wave of the future, especially with the new direction of Microsoft.
Next step ... cloud based ( ??? )
Tim