Using SET CFLAGS=-DHARBOUR_MAIN_WIN I get obj\b32\hbrun.c: obj\b32\external.c: Borland C++ 5.5.1 for Win32 Copyright (c) 1993, 2000 Borland Turbo Incremental Link 5.00 Copyright (c) 1997, 2000 Borland Error: Unresolved external '_main' referenced ...