How do I develop addin for MS Outlook that works with all
1. Outlook 2010
2. Outlook 2007
3. Outlook 2003
I have developed addin that works well with 2010 and 2007 BUT NOT with 2003.
I want something like this that works well with all the above three :)
You need VSTO
(Visual Studio Tools for Office). Here is an article to get you started.
You can also check out Office Development Center
.
You need to go for NetOffice.
It will allow you to abstract out from Outlook version.
Also it has a powerful diagnostic tool that will tell you which version of outlook your add-in is compatible with based on API features you use in your code.
Worked nicely for me.
http://netoffice.codeplex.com/