if you are talking about in forums then it is the conversations thingy,if your talking about in game then you put /msg (player who you are talking to's name) before your message
It seems pretty creepy tbh, having people reading through all of your private messages. -Not That It's A Bad Thing At All....I'm Very Fond Of The Idea Actually- Heh. Just used the word 'fond' haven't used it in a long time. Gahh, why am I still rambling on. Alrighty. Byeee cx