Antonio,
If I compile I get:
┌────────────────────────────────────────────────────────────────────────────┐
│ FWH 64 for Harbour 16.02 (MSVC++) Feb.2016 Harbour development power │▄
│ (c) FiveTech 1993-2016 for Microsoft Windows 9X/NT/200X/ME/XP/Vista/7/8/10 │█
└────────────────────────────────────────────────────────────────────────────┘█
▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀
Compiling...
Harbour 3.2.0dev (r1603082110)
Copyright (c) 1999-2016,
http://harbour-project.org/Compiling 'dlg.prg' and generating preprocessed output to 'dlg.ppo'...
Lines 4542, Functions/Procedures 1
Generating C source output to 'dlg.c'... Done.
cl wordt niet herkend als een interne
of externe opdracht, programma of batchbestand.
link wordt niet herkend als een interne
of externe opdracht, programma of batchbestand.
* Linking errors *
It seems that CL and LINK is not found.
I also can't find %ProgramFiles%\Microsoft Visual Studio 14.0\VC\vcvarsall.bat or %ProgramFiles(x86)%\Microsoft Visual Studio 14.0\VC\vcvarsall.bat that is in the buid64.bat file