app.js

const { ipcMain} = require("electron");
const path = require('path');
var net = process.argv[1].replace('--', '');
var namespace = 'QuickStart.' + net.charAt(0).toUpperCase() + net.substr(1);
if(net === 'core') net = '';
var version = net === 'standard' ? '2.0' : '7.0'

const baseNetAppPath = path.join(__dirname, '/src/'+ namespace +'/bin/Debug/net' + net + version);

process.env.EDGE_USE_CORECLR = 1;
if(net !== 'standard')
{
    process.env.EDGE_APP_ROOT = baseNetAppPath;
}

var edge = require('electron-edge-js');

var baseDll = path.join(baseNetAppPath, namespace + '.dll');

var localTypeName = 'QuickStart.LocalMethods';

var createOutlook = edge.func({
    assemblyFile: baseDll,
    typeName: localTypeName,
    methodName: 'CreateOutlook'
});

exports.invokeCreateOutlook = function (window, {toEmail, body, subject, ccEmail, bccEmail, attachment}) {
    createOutlook({toEmail, body, subject, ccEmail, bccEmail, attachment}, function(error, result) {
        if (error) throw error;
        window.webContents.send("fromMain", 'createOutlook', result);

        window.setTitle(result);
    });
}