VSTO development and deployment

The VSTO system 3.0 Runtime, which is the primary requirement to run the Office 2007 solutions, is built on VSTO. More importantly, the VSTO 3.0 is built into the Visual Studio 2008 installer. Service pack 1 for Visual Studio 2008 is available for users, which will improve the Visual Studio performance, and fix unknown bugs. The following VSTO related bug that used to load VSTO-derived Outlook Addins, was also fixed in Service Pack 1 — AddinLoader.DLL, is not signed. This DLL MUST be signed so as to enable Outlook to load any add-in developed under VSTO 2005, when user sets Macro security to High, and Trust installed addins... is NOT selected.