Copying Visual Studio Code Snippets to the Clipboard as HTML

When I try to build this macro, it shows me some errors. It does not know Drawing class and HttpUtility is not a member of Web.

I try to import System.Drawing but can not find it when I type dot behinds System. And I already import System.Web.

How can I fix it? My VS 2005 only installs C#, not VB.NET.