In-game messages

I'm sorry if this question was asked a hundred times before but I ca neither find a solution by myself nor on the forums (is there a hidden search function anywhere??):

How can I send a message to a player that shows up at a game's page instead of a general message (like the game won/lost messages). I can't find it...

Thanks in advance!
Yashem

After you've made your move on the board, the "Send Move" button appears. Below the "Send Move" button is a "Message" text field. What you type there will be shown to you or your opponent when that move is displayed in the game. That's an "in-game" message.

That's so f*cking easy that I feel really dumb now... *blush*

Thanks for the fast answer!