Auto-scroll down

Hi,

I've made a little instant messenger and for the chat window i've used a textbox with a vertical scroll bar but when ever it gets a message both the client and server textbox's flick up to the top of the scroll, any way I can get it so when the data is recieved it will automaticly scroll down as far as possible?
I'm using winsock by the way.

Are you setting focus to the text box at all? That could be the case i know it was with one of my old instant messengers :p.