Makefile:
# We're only here to build a DLL around the .LIB files that
# Data Translation provides, since Python's ctypes library
# can't work with .LIB. So, here we have a stupid little wrapper that
# simply exports the parts of the .LIB that we need to be able to
# work with.

DTROOT = "C:\Program Files (x86)\Data Translation\Win32\SDK"
DTINCLUDE = /I$(DTROOT)\Include
DTLIBS = /LIBPATH:$(DTROOT)\Lib64 oldaapi64.lib OLMEM64.lib Graph64.lib

CXXFLAGS = /MD /EHsc /DWIN32 /D_WINDOWS /DNOPCH /O2 $(DTINCLUDE)

DTOBJS = dt_wrapper.obj
DTTARGET = dt_wrapper.dll

all: $(DTTARGET)

$(DTTARGET): $(DTOBJS)
    link /dll /DEBUG /NOLOGO /out:$@ /SUBSYSTEM:WINDOWS $(DTOBJS) $(DTLIBS)

clean:
    del *dll *lib *pdb *obj *exp


Code:

#include "stdio.h"

__declspec(dllexport) int printer(void);

int printer(void) {
    printf("Hello, world!\n");
	return 0;
}


Output:

C:\mui\devices\resources\dataTranslationWrapper>nmake /f MAKEFILE

Microsoft (R) Program Maintenance Utility Version 10.00.30319.01
Copyright (C) Microsoft Corporation.  All rights reserved.

        cl /MD /EHsc /DWIN32 /D_WINDOWS /DNOPCH /O2 /I"C:\Program Files (x86)\Da
ta Translation\Win32\SDK"\Include /c dt_wrapper.cxx
Microsoft (R) 32-bit C/C++ Optimizing Compiler Version 16.00.30319.01 for 80x86
Copyright (C) Microsoft Corporation.  All rights reserved.

dt_wrapper.cxx
        link /dll /DEBUG /NOLOGO /out:dt_wrapper.dll /SUBSYSTEM:WINDOWS dt_wrapp
er.obj /LIBPATH:"C:\Program Files (x86)\Data Translation\Win32\SDK"\Lib64 oldaap
i64.lib OLMEM64.lib Graph64.lib
   Creating library dt_wrapper.lib and object dt_wrapper.exp