Roadmap for Apps for Office, VSTO, and VBA

Note:  This post is simultaneously published both to the VSTO blog and to the apps for Office blog.  To learn more about apps for Office, visit With all the buzz around the new apps for Office programming model, developers might be wondering: What benefits does the new app model bring, and which of the… Read more

BUG: “Old format or invalid type library” error when automating Excel (Christin Boyd)

A customer recently reported this bug when running their Shared Addin for Excel on French Windows.  Error: 0x80028018 (-2147647512) Description: Old Format or Invalid Type Library His solution worked great on English Windows, but gave errors in any other language.  This is a known problem in Excel and there are a few workarounds that work… Read more

DevConnections Conference: VSTO Session Demos (Christin Boyd)

Hi Folks!  If you’re not one of the 4,000 professionals attending DevConnections in Las Vegas, then never fear!  You can see my demos and learn about my session “Office Development with Visual Studio 2008” from this blog entry!  VS 2008 lets you target Office 2003 or Office 2007.  We recommend that you only install one… Read more