Button with an Icon

Good Day!

I'm new in Outsystems and CSS. May I kindly ask on how to embed an icon to the Button Widget?I have a couple of small buttons to be used for search/look up function and I'm planning to use an Icon for it. 

Please advise.

Many Thanks.

use a link, set the style and you are done.
(links can also be ajax-submits)

Thanks a lot...