http://www.microsoft.com/downloads/details.aspx?familyid=5e86cab3-6fd6-4955-b979-e1676db6b3cb&displaylang=en
"Microsoft Visual Studio 2005 Tools for the 2007 Microsoft Office
System (also known as “Visual Studio 2005 Tools for Office Second
Edition” or “VSTO 2005 SE”) is an add-on to Microsoft Visual Studio
2005 that enables you to build application-level add-ins for
applications in the 2007 Microsoft Office system and the Microsoft
Office 2003 System.
VSTO 2005 SE includes support for Microsoft Office InfoPath 2007 form
template projects, previously available as a separate product known as
the Microsoft Office InfoPath 2003 Toolkit for Visual Studio 2005. You
can now design InfoPath 2007 form solutions right in the Visual Studio
2005 environment if you have InfoPath 2007 installed on your computer.
"
Die Feature-Highlights dann auf der Downloadseite.
Chris