VSTO Security issues -Primary Interop Assemblies Stonehenge 23.02.2006 02:57:26 For those of you who are struggling trying to get a Visual Studio 2005 Tools for Offfice Project up and running - be aware that unless a machine had at least .NET Framework 1.1 already installed on it at the time the Office instalation was done (Preferably office profeesional 2003 - not sure if they are available at all on other versions) the '.NET Programmability Support' option will not even show as available, and the insterop asssemblies will NOT be installed even if you do a Full install and 'Run all from my computer'. If like me, you cannot get thw word (or excel) document assembly to run, even after you believe you have all the prerequistes on the client machine, just make sure they do actually have the interop assemblies installed - don't assume they are just because office was done with a full install. For a list of all requirements and further help plase see the follwing links: http://msdn2.microsoft.com/en-us/library/2ac08ee2(en-US,VS.80).aspx http://msdn2.microsoft.com/en-us/library/kh3965hw.aspx