I have Visual Studio 2008 and Visual Studio 2010. I installed the SDK for both. In the Visual Studio 2008 SDK there are some samples for DDEX in the directories:
Example.BasicProvider
Example.ExtendedProvider
Example.ProviderWithUICustomization
Example.RegistryBasedProvider
Example.VsPackageBasedProvider
Example.VsPackageBasedProvider
I want these same samples but for Visual Studio 2010. The Visual Studio 2010 SDK does not include these samples, and I can't find anything in Microsoft website.