It appears that the MSDN site has given up totally on supporting XP or assisting those that are still on it. If you do a search for any control reference information on MSDN you'll see that almost all mention of XP has been expunged, and Vista is usually listed as the minimum supported client now. I noticed this the other day when looking up the EM_SETCUEBANNER information, and I've seen it on every listview variable/macro I've looked up as well. So, don't be surprised if you see topics with remarks that say such-and-such setting or variable doesn't work on XP because MSDN says it's Vista+.
Also, don't be surprised if in the future that some of the Windows APIs drop backwards compatibility for supposedly unsupported clients such as XP.