Chat input event?

[Striph]

I've created a quick lua mod to hide the chatinput box by default while retaining the "IM Style" option. When i load in its hidden, but as soon as i type something and press enter, it resets it back to being shown. I have a slash command to rehide it and it works, but if i say something in game it resets it.

Is there a way to do an event for when you say something in the input box that you could call something? That way I could just rehide it everytime the box is used.