Can this command use for an external dll program that I wrote in C# language?
If can , how i use it?

I try to use it in this way:

function OnEvent_ChatWndSendMessage(chatWnd,message)
{
   if(message=='test')
   {
     message=Interop.Call2("plus_2.Class1.dll","hello");
     
   }
return message;
}
I want if i type "test" in the chat window then the dll file that i created will be call and return a string value and replace the text that i want to send out . 

I think you should use ActiveX objects. Create an activex by doing:

code:

---

var oActiveX = new ActiveXObject("YourClass.YourObject");

---