How to embed MS Word in My C# application?

Hi,
I want to embed MS Word in my form.. So I searched and find this code :

Add a COM reference : Microsoft Office 12.0 Object Library

 
Then add the following namespace :
 
using Microsoft.Office;
using office = Microsoft.Office.Interop.Word;
 
And then in the code where you want to use, add this :
 
var wordApp = new office.Application();
Document document=wordApp.Documents.Open(//Specify the parameters)

But I don't find the Microsoft.Office.Interop.Word; the only class have in Office is Core...

I'm using .NET Framework 4.0;

How do I embed MS word in windows Form??

Regards :
Jayanta.

Thanks In Advanced..

Tags: C#, Windows Forms