The Emoticon window is used to display and select a character emote.
The window will appear when you click on the button labeled "Emoticon" at the button at the bottom of the Chat window. Click on any of the Emoticon buttons to select an emote for your character to perform.
There is nothing shown when the window is concealed. The window is invisible with no graphics or controls to minimize the amount of memory used. Nothing will appear on the screen when you attempt to activate the window.