PROPSHEETHEADER and PSH_PIVOT to get the horizontal pivot scroll?

Question

Windows Mobile 6.5.3 has a "touch friendlier" pivot at the top of the screen instead of tabs at the bottom.

In the docs for PROPSHEETHEADER, the dwFlag value PSH_PIVOT is documented:

PSH_PIVOT   Applies to Windows Mobile 6.5.3 
            Replaces dialog box tabs with a simple pivot (horizontal spinner).

It's supposed to bed defined in prsht.h, but it's not. My 6.5.3 and 6 headers differ only in this:

#define PSM_GETPIVOTCONTROL       (WM_USER + 119)
#define PropSheet_GetPivotControl(hDlg) \
        (HWND)SNDMSG(hDlg, PSM_GETPIVOTCONTROL, 0, 0)

which is in the 6.5.3 prsht.h, but not in the 6 one.

What's the value of PSH_PIVOT? Did they forget to include it?