In R2.5, Discussion Board Plus will provide and enable an Emoji checkbox in the Ribbon. It will display the lists of available Emoticons when you create a topic or reply to a Discussion Board Plus list.
You can find free emojis here.
Go to the List tab → Click on Forum Settings → select Enable Emoji checkbox. Click OK.
Click New Discussion to create a topic → you will see an Emoji icon in the bottom right part of the screen
There are five tabs from which you can select Emoticons
You can type “:” to see the list of Emoticons.