$NOWIN directive
Purpose: Creates program with no WIN32 header files.
By default, BCX includes several common WIN32 header files. You can disable this by adding the line $NOWIN to your BASIC program source code. This will save you from having to remove those Win32 *.h files if you want to use the "C" code with another non-windows "C" compiler -- such as the free Turbo C compiler from Borland.