How can I get started with Microsoft Ink for Mobile?

Question

We have a simple requirement - to allow drawing on top of a picture and save it.

I've seen an example using an ink control (which I am lead to believe comes with .net) that does exactly what I want, however, no one was able to tell me where to find it or how to include it in my project.

After a lot of googling, I've found a lot of resources but none of them are particularly useful.

Note that we'll need to do this on a windows form running on XP,Vista and 7, (.net 2 & 3.5) and also on the compact framework 6.5 (not tablet pc)

This has to be the most hard to find sdk/api/reference that I've ever searched for. Please can someone point me in the right direction. Thanks.

-For compact framework, this has been suggested. How about for .Net2.0 and .Net3.5 (not tablet editions)?