The code above is VB.NET code, not VBA. This code (as well as the blog post itself) shows how to handle the ItemSend event in a COM add-in based on our Add-in Express for Office and .net product.

I think you can handle the ItemSend event in VBA too, please have a look at the following MSDN article for details:
http://msdn.microsoft.com/en-us/library/aa171284(v=office.11).aspx

Great code. I am very novis in VB and MS technology, working mainly in Oracle.

Can you please let me know where exactly this code needs to be placed? In Tool -> Macro in outlook or some where else.
Thanks,
Arijit