You click New, Project and select Other projects, Extensibility projects,
Visual Studio .NET Add-in.
See also:
HOWTO: Add a popup command bar to the context menu of a code window of
Visual Studio .NET
See http://support.microsoft.com/default.aspx?scid=kb;en-us;555153
HOWTO: Guessing the name of a command bar to add a custom menu entry in
Visual Studio .NET add-ins
http://support.microsoft.com/default.aspx?scid=kb;en-us;555154
In this forum, Files section, you have a lot of resources to get you started
(free join):
http://groups.yahoo.com/group/vsnetaddin/

Signature
Carlos J. Quintero (Visual Developer - .NET MVP)
The MZ-Tools all-in-one add-in, now for .NET: http://www.mztools.com
> I'm new to VS addin development, my question is that can it be achieved just
> like create addin for Office? Which type libary should I import?