---
title: x++ Add custom DMF entity to form; Open in Excel
date: 2019-01-18T21:53:06.000Z
lastmod: 2019-01-18T21:53:06.000Z
description: Use x++ form extension to add custom DMF data entity to a form's Open in Excel menu.  
tags: x++, DMF, Open in Excel, D365, Excel
author: Michael Stashwick
author_url: https://www.d365stuff.co/author/michael/
publisher: D365 Stuff
publisher_url: https://www.d365stuff.co/
---

18 January 2019 / [x++](/tag/x/)

# x++ Add custom DMF entity to form; Open in Excel

We all know that data entities that have the same root datasource (table) as a
form will cause the data entity to automagically appear in the form's Open in
Excel menu option. What if you need to force add this option via extension?
It's a very reasonable request that you'll get asked to do, and is
surprisingly hard to research. Until now.

The code has changed a bit throughout D365's evolution. If anything, it's
gotten simpler since you no longer have to implement any ExportToExcel*
classes.

![](https://www.d365stuff.co/content/images/2019/01/image.png)

Need more fields to appear in your Excel sheet? Add them to the AutoReport
fieldgroup of the table!

![Michael Stashwick](/content/images/size/w100/2019/07/FacePic.jpg)

#### [Michael Stashwick](/author/michael/)

Read [more posts](/author/michael/) by this author.

[Read More](/author/michael/)