Dev-cpp C语言编写和调用dll

Dev-cpp新建DLL项目。

dllmain.cpp

#include "dll.h"
#include <windows.h>

int add(int a, int b) {     
    	return a + b;
}

dll.h

#ifndef _DLL_H_
#define _DLL_H_

extern "C" __declspec(dllexport) int add(int a, int b);

#endif

调用DLL，将dll拷贝至调用的项目路径中。

调用代码：

#include <iostream>
#include<Windows.h>

#include "dll.h"
/* run this program using the console pauser or add your own getch, system("pause") or input loop */


int main(int argc, char** argv) {
	printf("Hello, World!");
	
	HMODULE h = NULL;//创建一个句柄h
	h = LoadLibrary("dlltest.dll");
	if (h == NULL)//检测是否加载dll成功
	{
		printf("加载DLLTest1.dll动态库失败\n");
		return -1;
	}
	
	typedef int(*AddFunc)(int, int); // 定义函数指针类型
	AddFunc add;
	add = (AddFunc)GetProcAddress(h, "add");
 	
	int sum = add(100, 20);
	printf("动态调用的结果%d\n", sum);

	
	return 0;
}

python调用：

from ctypes import *

#----------以下四种加载DLL方式皆可—————————
# pDLL = WinDLL("./myTest.dll")
# pDll = windll.LoadLibrary("./myTest.dll")
# pDll = cdll.LoadLibrary("./myTest.dll")
pDll = CDLL("./dlltest.dll")

#调用动态链接库函数
res = pDll.add(100,2)
#打印返回结果
print(res)