npm install --global --production windows-build-tools(在管理员权限打开的命令行中执行)

npm install -g node-gyp //依赖python2.7，包含在windows-build-tools中

npm install ffi

npm install ref

'use strict';

const path = require('path');

let ffi = require('ffi');

let mydll = path.join(__dirname, '../dll/helloworld.dll');

let dll= ffi.Library(mydll, {

    'helloworld': ['int', ['int']]

});

console.log(dll.helloworld(1));//关闭 RLM 通信端口