I am working on an Outlook add-in that has custom forms and interacts
with web services. The current version is a managed (C#.net) COM add-
in, but I am running into a number of issues, most involving other add-
ins. I'm looking into two possible solutions: using a COM shim and
using VSTO. My understanding is that with a COM shim, there is minimal
rewrite of existing code, but that VSTO would allow me to use managed
code. I am required to have only one codebase for both Outlook 2003
and 2007 (and possibly future versions). Any advice would be greatly
appreciated.