I tried to work with Table input, successfully, using the tablet PC SDK. Tablet PC is a weird kind of Windows version. It was promoted extensively bundled with special Tablet PCs. Apparently, there was no an official way to buy this version to use it for a regular computer with the tablet device or a tablet monitor; it was only available as the OEM product. I regularly met people promoting such PCs in the building of railway station which I use for my commute at that time. Suddenly, all this activity was seized, and most of such PCs disappeared. I regret it too much, as I am a fan of pen input and have good experience in drawing and photo re-touching. (Not only drawing, but even photo re-touching without a tablet is like repairing a computer with an axe). Everything could be downloaded from Microsoft for free, even the hand-writing recognition engine, which works pretty well.
However, with Tablet PC SDK, you don't really need a Tablet PC. One can have all the power of Tablet PC on Windows 2000 and later (and then you can down-load, install and use the hand-writing recognition engine and some other stuff), if this person only have enough knowledge to compile .NET code. The SDK provides and access to individual strokes and pen pressure information. The appropriate events are separate from mouse evens (even though a pen generates the mouse events as well, of course).
I have a version of this SDK on my old computer I still use; and it is functional. However, I don't know where to download it. I'll appreciate a link very much.