Shoutbox

I already have tried to do look:

js code:

---

var window = null
function OnEvent_ChatWndReceiveMessage(ChatWnd, Origin, Message, MsgKind){
    window = ChatWnd;
    Debug.Trace(window);
}

---

return:

Function: OnEvent_ChatWndReceiveMessage
Error: Type mismatch (code: -2146828275)
An error occurred in function OnEvent_ChatWndReceiveMessage.
Code: -2147352567

Can somebody give me a tip?