Zhiyi Zhang (@zhiyi) commented about dlls/comctl32/propsheet.c:
+{
- PSHNOTIFY psn;
 - HWND focusable_item = NULL;
 - HWND initial_focus = NULL;
 - focusable_item = GetNextDlgTabItem(psInfo->proppage[index].hwndPage, NULL, FALSE);
 - if (!focusable_item)
 - return;
 - psn.hdr.code = PSN_QUERYINITIALFOCUS;
 - psn.hdr.hwndFrom = hwndDlg;
 - psn.hdr.idFrom = 0;
 - psn.lParam = 0;
 - initial_focus = (HWND)SendMessageW(psInfo->proppage[index].hwndPage, WM_NOTIFY, 0, (LPARAM)&psn);
 
Same here.