Thanks to the update, Windows Phone users running WhatsApp will be able to send videos, photos and now documents to friends, family and co-workers. Previously, WhatsApp gave subscribers the ability to only receive documents. Now, a WhatsApp user on Windows Phone can not only receive that important document related to the Anderson account, but can also disseminate the changes made to the Hamilton account.
If you don't already have WhatsApp on your Windows Phone handset, you can add it by clicking on the sourcelink. In case you've forgotten, Facebook purchased the messaging app for nearly $22 billion in October 2014.
source: WhatsApp (WindowsPhone) via MSPoweruser