May 26th, 2015 Now you can use custom stickers on Telegram
The first thing you have to do to start using Telegram for Desktop is associate it with your cell phone. Once that's done, you can chat with all of your Telegram contacts, continuing conversations on your computer that originally started on your phone, and even using your computer to view photos that have been shared with you.
The only thing you can't use Telegram for Desktop for is to continue with a private conversation, since those are strictly limited to your phone in order to provide better security.
Telegram for Desktop has a clean, accessible interface, so communicating with all of your contacts couldn't be easier. Just click their name and you can start chatting in the same window. Fast and easy.