Thanks to Alex D. for sending in this one.

I just did a fresh install of WinXP and immediately installed sp1 (build 1106). After that, i started tweaking and performed the hack that allows hidden options in the "add/remove windows components" to show up. I opened up the sysoc.inf (in C:/Windows/inf) and was surprized by what i found.

There existed mysterious entries for TabletPC and Freestyle! Enabling the TabletPC entry produced only one of several blank add/remove options. However, unhiding "Freestyle" added an option to install/uninstall Freestyle. By default, it seems to be installed (or at least the checkbox checked).

I looked at some of the files mentioned in sysoc.inf and they look EXTREMELY interesting (the Tabletpc.inf file looks like it installs all of the TabletPC features and the Freestyle inf file includes a lot of insteresting stuff itself).

Here is the stuff from the sysoc.inf file:

TabletPC=tabletoc.dll,TabletSetupProc,Tabletpc.inf,,7

[Global] WindowTitle=%WindowTitle% WindowTitle.StandAlone="*"

[Components] Freestyle=medctroc.dll,MedCtrOCISetupProc,medctroc.inf,,7

netfx=netfxocm.dll,UrtOcmProc,netfxocm.inf,,7

[Components] msnexplr=ocmsn.dll,OcEntry,msnmsn.inf,,7

[Strings] WindowTitle="Windows Professional Setup" WindowTitle_Standalone="Windows Components Wizard"

In the Tabletpc.inf file there was 2 references cdname ="Windows XProfessional CD2" SHORTCUT_NAME_INKBALL = "InkBall" and and in the medctroc.inf cd2name = "Windows XP Professional CD2" netfxpath = "Microsoft.NET\Framework\v1.0.3705" Sample_TV = "Recorded TV" Sample_Pictures = "My Pictures\Sample Pictures"

You can click on the headline to see Freestyle listed in the Add/Remove programs. Anyone else done this and able to shed light on this? If so then post in the comments below.