创建DLL分为两种方法，先介绍第一种

一、创建DLL

（1）

// dll.h

#pragma once

//dll.h

#ifndef DLL_H_

#define DLL_H_

void printhello();

void callPython();

extern "C" _declspec(dllexport) void start();

#endif

//dll.cpp

#pragma once

#include <iostream>

#include <Python.h>

using namespace std;

void printhello() {

	cout << "hello c++ dll !" << endl;

}

void callPython() {

	Py_Initialize();

	if (!Py_IsInitialized()) PyErr_Print();

	PyRun_SimpleString("import sys");

	PyRun_SimpleString("sys.path.append('D:\\CodeDemo')");

	PyObject* pModule = NULL;

	PyObject* pFunc = NULL;

	PyObject* pDict = NULL;

	PyObject* pKey = NULL;

	PyObject* pSubDict = NULL;

	if (!(pModule = PyImport_ImportModule("hellopython"))) PyErr_Print();

	if (!(pFunc = PyObject_GetAttrString(pModule, "hellopython"))) PyErr_Print();

	PyObject_CallObject(pFunc, NULL);

}

extern "C" _declspec(dllexport)void start()

{

	printhello();

	callPython();

}