win32u: Move NtUserGetAncestor implementation from user32.

dlls/user32/defwnd.c

@@ -496,7 +496,7 @@ static LRESULT DEFWND_DefWinProc( HWND hwnd, UINT msg, WPARAM wParam, LPARAM lPa
 
             if( wParam == VK_F4 )       /* try to close the window */
             {
-                HWND top = GetAncestor( hwnd, GA_ROOT );
+                HWND top = NtUserGetAncestor( hwnd, GA_ROOT );
                 if (!(GetClassLongW( top, GCL_STYLE ) & CS_NOCLOSE))
                     PostMessageW( top, WM_SYSCOMMAND, SC_CLOSE, 0 );
             }
@@ -516,7 +516,7 @@ static LRESULT DEFWND_DefWinProc( HWND hwnd, UINT msg, WPARAM wParam, LPARAM lPa
         /* Press and release F10 or ALT */
         if (((wParam == VK_MENU || wParam == VK_LMENU || wParam == VK_RMENU)
              && iMenuSysKey) || ((wParam == VK_F10) && iF10Key))
-              SendMessageW( GetAncestor( hwnd, GA_ROOT ), WM_SYSCOMMAND, SC_KEYMENU, 0L );
+              SendMessageW( NtUserGetAncestor( hwnd, GA_ROOT ), WM_SYSCOMMAND, SC_KEYMENU, 0L );
         iMenuSysKey = iF10Key = 0;
         break;
 

dlls/user32/desktop.c

@@ -104,7 +104,7 @@ LRESULT WINAPI DesktopWndProc( HWND hwnd, UINT message, WPARAM wParam, LPARAM lP
             ATOM atom;
             WCHAR buffer[37];
 
-            if (GetAncestor( hwnd, GA_PARENT )) return FALSE;  /* refuse to create non-desktop window */
+            if (NtUserGetAncestor( hwnd, GA_PARENT )) return FALSE;  /* refuse to create non-desktop window */
 
             swprintf( buffer, ARRAY_SIZE(buffer), L"%08x-%04x-%04x-%02x%02x-%02x%02x%02x%02x%02x%02x",
                       guid->Data1, guid->Data2, guid->Data3,

dlls/user32/driver.c

@@ -131,7 +131,7 @@ static void CDECL nulldrv_UpdateClipboard(void)
 static BOOL CDECL nodrv_CreateWindow( HWND hwnd )
 {
     static int warned;
-    HWND parent = GetAncestor( hwnd, GA_PARENT );
+    HWND parent = NtUserGetAncestor( hwnd, GA_PARENT );
 
     /* HWND_MESSAGE windows don't need a graphics driver */
     if (!parent || parent == get_user_thread_info()->msg_window) return TRUE;

dlls/user32/focus.c

@@ -165,7 +165,7 @@ static BOOL set_active_window( HWND hwnd, HWND *prev, BOOL mouse, BOOL focus )
         SendMessageW( hwnd, WM_ACTIVATE,
                       MAKEWPARAM( mouse ? WA_CLICKACTIVE : WA_ACTIVE, IsIconic(hwnd) ),
                       (LPARAM)previous );
-        if (GetAncestor( hwnd, GA_PARENT ) == GetDesktopWindow())
+        if (NtUserGetAncestor( hwnd, GA_PARENT ) == GetDesktopWindow())
             PostMessageW( GetDesktopWindow(), WM_PARENTNOTIFY, WM_NCACTIVATE, (LPARAM)hwnd );
     }
 
@@ -179,7 +179,7 @@ static BOOL set_active_window( HWND hwnd, HWND *prev, BOOL mouse, BOOL focus )
         /* Do not change focus if the window is no more active */
         if (hwnd == info.hwndActive)
         {
-            if (!info.hwndFocus || !hwnd || GetAncestor( info.hwndFocus, GA_ROOT ) != hwnd)
+            if (!info.hwndFocus || !hwnd || NtUserGetAncestor( info.hwndFocus, GA_ROOT ) != hwnd)
                 set_focus_window( hwnd );
         }
     }
@@ -291,7 +291,7 @@ HWND WINAPI SetFocus( HWND hwnd )
             LONG style = GetWindowLongW( hwndTop, GWL_STYLE );
             if (style & (WS_MINIMIZE | WS_DISABLED)) return 0;
             if (!(style & WS_CHILD)) break;
-            parent = GetAncestor( hwndTop, GA_PARENT );
+            parent = NtUserGetAncestor( hwndTop, GA_PARENT );
             if (!parent || parent == GetDesktopWindow())
             {
                 if ((style & (WS_POPUP|WS_CHILD)) == WS_CHILD) return 0;

dlls/user32/menu.c

@@ -3436,7 +3436,7 @@ void MENU_TrackKbdMenuBar( HWND hwnd, UINT wParam, WCHAR wChar)
     /* find window that has a menu */
 
     while (is_win_menu_disallowed(hwnd))
-        if (!(hwnd = GetAncestor( hwnd, GA_PARENT ))) return;
+        if (!(hwnd = NtUserGetAncestor( hwnd, GA_PARENT ))) return;
 
     /* check if we have to track a system menu */
 

dlls/user32/message.c

@@ -2552,7 +2552,7 @@ static BOOL process_mouse_message( MSG *msg, UINT hw_id, ULONG_PTR extra_info, H
 
         if (msg->hwnd != info.hwndActive)
         {
-            HWND hwndTop = GetAncestor( msg->hwnd, GA_ROOT );
+            HWND hwndTop = NtUserGetAncestor( msg->hwnd, GA_ROOT );
 
             if ((GetWindowLongW( hwndTop, GWL_STYLE ) & (WS_POPUP|WS_CHILD)) != WS_CHILD)
             {

dlls/user32/nonclient.c

@@ -1083,7 +1083,7 @@ static void  NC_DoNCPaint( HWND  hwnd, HRGN  clip )
  */
 LRESULT NC_HandleNCPaint( HWND hwnd , HRGN clip)
 {
-    HWND parent = GetAncestor( hwnd, GA_PARENT );
+    HWND parent = NtUserGetAncestor( hwnd, GA_PARENT );
     DWORD dwStyle = GetWindowLongW( hwnd, GWL_STYLE );
 
     if( dwStyle & WS_VISIBLE )
@@ -1119,7 +1119,7 @@ LRESULT NC_HandleNCActivate( HWND hwnd, WPARAM wParam, LPARAM lParam )
     {
         NC_DoNCPaint( hwnd, (HRGN)1 );
 
-        if (GetAncestor( hwnd, GA_PARENT ) == GetDesktopWindow())
+        if (NtUserGetAncestor( hwnd, GA_PARENT ) == GetDesktopWindow())
             PostMessageW( GetDesktopWindow(), WM_PARENTNOTIFY, WM_NCACTIVATE, (LPARAM)hwnd );
     }
 
@@ -1379,7 +1379,7 @@ LRESULT NC_HandleNCLButtonDown( HWND hwnd, WPARAM wParam, LPARAM lParam )
             {
                 if ((GetWindowLongW( top, GWL_STYLE ) & (WS_POPUP|WS_CHILD)) != WS_CHILD)
                     break;
-                parent = GetAncestor( top, GA_PARENT );
+                parent = NtUserGetAncestor( top, GA_PARENT );
                 if (!parent || parent == GetDesktopWindow()) break;
                 top = parent;
             }

dlls/user32/painting.c

@@ -841,7 +841,7 @@ void move_window_bits_parent( HWND hwnd, HWND parent, const RECT *window_rect, c
     }
 
     TRACE( "copying %s -> %s\n", wine_dbgstr_rect( &src ), wine_dbgstr_rect( &dst ));
-    MapWindowPoints( GetAncestor( hwnd, GA_PARENT ), parent, (POINT *)&src, 2 );
+    MapWindowPoints( NtUserGetAncestor( hwnd, GA_PARENT ), parent, (POINT *)&src, 2 );
     OffsetRect( &src, win->client_rect.left - win->visible_rect.left,
                 win->client_rect.top - win->visible_rect.top );
     OffsetRect( &dst, -window_rect->left, -window_rect->top );
@@ -1018,7 +1018,7 @@ HDC WINAPI GetDCEx( HWND hwnd, HRGN hrgnClip, DWORD flags )
 
     if (flags & DCX_WINDOW) flags &= ~DCX_CLIPCHILDREN;
 
-    parent = GetAncestor( hwnd, GA_PARENT );
+    parent = NtUserGetAncestor( hwnd, GA_PARENT );
     if (!parent || (parent == GetDesktopWindow()))
         flags = (flags & ~DCX_PARENTCLIP) | DCX_CLIPSIBLINGS;
 

dlls/user32/user32.spec

@@ -252,7 +252,7 @@
 @ stdcall GetAltTabInfo(long long ptr ptr long) GetAltTabInfoA
 @ stdcall GetAltTabInfoA(long long ptr ptr long)
 @ stdcall GetAltTabInfoW(long long ptr ptr long)
-@ stdcall GetAncestor(long long)
+@ stdcall GetAncestor(long long) NtUserGetAncestor
 @ stdcall GetAppCompatFlags(long)
 @ stdcall GetAppCompatFlags2(long)
 @ stdcall -import GetAsyncKeyState(long) NtUserGetAsyncKeyState

dlls/user32/win.c

@@ -2558,7 +2558,7 @@ LONG_PTR WIN_SetWindowLong( HWND hwnd, INT offset, UINT size, LONG_PTR newval, B
 /* FIXME: move to win32u */
 static ULONG_PTR get_hwnd_parent( HWND hwnd )
 {
-    HWND parent = GetAncestor( hwnd, GA_PARENT );
+    HWND parent = NtUserGetAncestor( hwnd, GA_PARENT );
     if (parent == GetDesktopWindow()) parent = GetWindow( hwnd, GW_OWNER );
     return (ULONG_PTR)parent;
 }
@@ -2913,67 +2913,6 @@ HWND WINAPI GetParent( HWND hwnd )
 
 
 /*****************************************************************
- *		GetAncestor (USER32.@)
- */
-HWND WINAPI GetAncestor( HWND hwnd, UINT type )
-{
-    WND *win;
-    HWND *list, ret = 0;
-
-    switch(type)
-    {
-    case GA_PARENT:
-        if (!(win = WIN_GetPtr( hwnd )))
-        {
-            SetLastError( ERROR_INVALID_WINDOW_HANDLE );
-            return 0;
-        }
-        if (win == WND_DESKTOP) return 0;
-        if (win != WND_OTHER_PROCESS)
-        {
-            ret = win->parent;
-            WIN_ReleasePtr( win );
-        }
-        else /* need to query the server */
-        {
-            SERVER_START_REQ( get_window_tree )
-            {
-                req->handle = wine_server_user_handle( hwnd );
-                if (!wine_server_call_err( req )) ret = wine_server_ptr_handle( reply->parent );
-            }
-            SERVER_END_REQ;
-        }
-        break;
-
-    case GA_ROOT:
-        if (!(list = list_window_parents( hwnd ))) return 0;
-
-        if (!list[0] || !list[1]) ret = WIN_GetFullHandle( hwnd );  /* top-level window */
-        else
-        {
-            int count = 2;
-            while (list[count]) count++;
-            ret = list[count - 2];  /* get the one before the desktop */
-        }
-        HeapFree( GetProcessHeap(), 0, list );
-        break;
-
-    case GA_ROOTOWNER:
-        if (is_desktop_window( hwnd )) return 0;
-        ret = WIN_GetFullHandle( hwnd );
-        for (;;)
-        {
-            HWND parent = GetParent( ret );
-            if (!parent) break;
-            ret = parent;
-        }
-        break;
-    }
-    return ret;
-}
-
-
-/*****************************************************************
  *		SetParent (USER32.@)
  */
 HWND WINAPI SetParent( HWND hwnd, HWND parent )

dlls/user32/winpos.c

@@ -727,7 +727,7 @@ MINMAXINFO WINPOS_GetMinMaxInfo( HWND hwnd )
     else
         adjustedStyle = style;
 
-    GetClientRect(GetAncestor(hwnd,GA_PARENT), &rc);
+    GetClientRect(NtUserGetAncestor(hwnd,GA_PARENT), &rc);
     AdjustWindowRectEx(&rc, adjustedStyle, ((style & WS_POPUP) && GetMenu(hwnd)), exstyle);
 
     xinc = -rc.left;
@@ -870,7 +870,7 @@ static POINT get_minimized_pos( HWND hwnd, POINT pt )
     MINIMIZEDMETRICS metrics;
     int width, height;
 
-    parent = GetAncestor( hwnd, GA_PARENT );
+    parent = NtUserGetAncestor( hwnd, GA_PARENT );
     if (parent == GetDesktopWindow())
     {
         MONITORINFO mon_info;
@@ -974,7 +974,7 @@ UINT WINPOS_MinMaximize( HWND hwnd, UINT cmd, LPRECT rect )
         if (GetFocus() == hwnd)
         {
             if (GetWindowLongW(hwnd, GWL_STYLE) & WS_CHILD)
-                SetFocus(GetAncestor(hwnd, GA_PARENT));
+                SetFocus(NtUserGetAncestor(hwnd, GA_PARENT));
             else
                 SetFocus(0);
         }
@@ -1139,7 +1139,7 @@ static BOOL show_window( HWND hwnd, INT cmd )
     }
     swp = new_swp;
 
-    parent = GetAncestor( hwnd, GA_PARENT );
+    parent = NtUserGetAncestor( hwnd, GA_PARENT );
     if (parent && !IsWindowVisible( parent ) && !(swp & SWP_STATECHANGED))
     {
         /* if parent is not visible simply toggle WS_VISIBLE and return */
@@ -1166,7 +1166,7 @@ static BOOL show_window( HWND hwnd, INT cmd )
         hFocus = GetFocus();
         if (hwnd == hFocus)
         {
-            HWND parent = GetAncestor(hwnd, GA_PARENT);
+            HWND parent = NtUserGetAncestor(hwnd, GA_PARENT);
             if (parent == GetDesktopWindow()) parent = 0;
             SetFocus(parent);
         }
@@ -1203,7 +1203,7 @@ static BOOL show_window( HWND hwnd, INT cmd )
     {
         SetFocus( hwnd );
         /* Send a WM_ACTIVATE message for a top level window, even if the window is already active */
-        if (GetAncestor( hwnd, GA_ROOT ) == hwnd && !(swp & SWP_NOACTIVATE))
+        if (NtUserGetAncestor( hwnd, GA_ROOT ) == hwnd && !(swp & SWP_NOACTIVATE))
             SendMessageW( hwnd, WM_ACTIVATE, WA_ACTIVE, 0 );
     }
 
@@ -1616,7 +1616,7 @@ void WINPOS_ActivateOtherWindow(HWND hwnd)
 
     if ((GetWindowLongW( hwnd, GWL_STYLE ) & WS_POPUP) && (hwndTo = GetWindow( hwnd, GW_OWNER )))
     {
-        hwndTo = GetAncestor( hwndTo, GA_ROOT );
+        hwndTo = NtUserGetAncestor( hwndTo, GA_ROOT );
         if (can_activate_window( hwndTo )) goto done;
     }
 
@@ -2037,7 +2037,7 @@ static BOOL fixup_flags( WINDOWPOS *winpos, const RECT *old_window_rect, int par
     if (winpos->cy < 0) winpos->cy = 0;
     else if (winpos->cy > 32767) winpos->cy = 32767;
 
-    parent = GetAncestor( winpos->hwnd, GA_PARENT );
+    parent = NtUserGetAncestor( winpos->hwnd, GA_PARENT );
     if (!IsWindowVisible( parent )) winpos->flags |= SWP_NOREDRAW;
 
     if (wndPtr->dwStyle & WS_VISIBLE) winpos->flags &= ~SWP_SHOWWINDOW;
@@ -2160,7 +2160,7 @@ BOOL set_window_pos( HWND hwnd, HWND insert_after, UINT swp_flags,
                      const RECT *window_rect, const RECT *client_rect, const RECT *valid_rects )
 {
     WND *win;
-    HWND surface_win = 0, parent = GetAncestor( hwnd, GA_PARENT );
+    HWND surface_win = 0, parent = NtUserGetAncestor( hwnd, GA_PARENT );
     BOOL ret, needs_update = FALSE;
     RECT visible_rect, old_visible_rect, old_window_rect, old_client_rect, extra_rects[3];
     struct window_surface *old_surface, *new_surface = NULL;
@@ -2352,8 +2352,8 @@ BOOL USER_SetWindowPos( WINDOWPOS * winpos, int parent_x, int parent_y )
               winpos->hwndInsertAfter == HWND_TOPMOST ||
               winpos->hwndInsertAfter == HWND_NOTOPMOST))
         {
-            HWND parent = GetAncestor( winpos->hwnd, GA_PARENT );
-            HWND insertafter_parent = GetAncestor( winpos->hwndInsertAfter, GA_PARENT );
+            HWND parent = NtUserGetAncestor( winpos->hwnd, GA_PARENT );
+            HWND insertafter_parent = NtUserGetAncestor( winpos->hwndInsertAfter, GA_PARENT );
 
             /* hwndInsertAfter must be a sibling of the window */
             if (!insertafter_parent) return FALSE;
@@ -2387,7 +2387,7 @@ BOOL USER_SetWindowPos( WINDOWPOS * winpos, int parent_x, int parent_y )
 
     if((winpos->flags & (SWP_NOZORDER | SWP_HIDEWINDOW | SWP_SHOWWINDOW)) != SWP_NOZORDER)
     {
-        if (GetAncestor( winpos->hwnd, GA_PARENT ) == GetDesktopWindow())
+        if (NtUserGetAncestor( winpos->hwnd, GA_PARENT ) == GetDesktopWindow())
             winpos->hwndInsertAfter = SWP_DoOwnedPopups( winpos->hwnd, winpos->hwndInsertAfter );
     }
 
@@ -2422,7 +2422,7 @@ BOOL USER_SetWindowPos( WINDOWPOS * winpos, int parent_x, int parent_y )
          (!(orig_flags & SWP_SHOWWINDOW) &&
           (winpos->flags & SWP_AGG_STATUSFLAGS) != SWP_AGG_NOGEOMETRYCHANGE))
         {
-            HWND parent = GetAncestor( winpos->hwnd, GA_PARENT );
+            HWND parent = NtUserGetAncestor( winpos->hwnd, GA_PARENT );
             if (!parent || parent == GetDesktopWindow()) parent = winpos->hwnd;
             erase_now( parent, 0 );
         }

dlls/win32u/syscall.c

@@ -112,6 +112,7 @@ static void * const syscalls[] =
     NtUserCreateWindowStation,
     NtUserDestroyAcceleratorTable,
     NtUserFindExistingCursorIcon,
+    NtUserGetAncestor,
     NtUserGetAtomName,
     NtUserGetClassName,
     NtUserGetClipboardFormatName,

dlls/win32u/win32u.spec

@@ -889,7 +889,7 @@
 @ stub NtUserFunctionalizeDisplayConfig
 @ stub NtUserGetActiveProcessesDpis
 @ stub NtUserGetAltTabInfo
-@ stub NtUserGetAncestor
+@ stdcall -syscall NtUserGetAncestor(long long)
 @ stub NtUserGetAppImeLevel
 @ stdcall NtUserGetAsyncKeyState(long)
 @ stdcall -syscall NtUserGetAtomName(long ptr)

dlls/win32u/window.c

@@ -454,6 +454,135 @@ static HWND get_window_relative( HWND hwnd, UINT rel )
     return retval;
 }
 
+/*******************************************************************
+ *           list_window_parents
+ *
+ * Build an array of all parents of a given window, starting with
+ * the immediate parent. The array must be freed with free().
+ */
+static HWND *list_window_parents( HWND hwnd )
+{
+    WND *win;
+    HWND current, *list;
+    int i, pos = 0, size = 16, count;
+
+    if (!(list = malloc( size * sizeof(HWND) ))) return NULL;
+
+    current = hwnd;
+    for (;;)
+    {
+        if (!(win = get_win_ptr( current ))) goto empty;
+        if (win == WND_OTHER_PROCESS) break;  /* need to do it the hard way */
+        if (win == WND_DESKTOP)
+        {
+            if (!pos) goto empty;
+            list[pos] = 0;
+            return list;
+        }
+        list[pos] = current = win->parent;
+        release_win_ptr( win );
+        if (!current) return list;
+        if (++pos == size - 1)
+        {
+            /* need to grow the list */
+            HWND *new_list = realloc( list, (size + 16) * sizeof(HWND) );
+            if (!new_list) goto empty;
+            list = new_list;
+            size += 16;
+        }
+    }
+
+    /* at least one parent belongs to another process, have to query the server */
+
+    for (;;)
+    {
+        count = 0;
+        SERVER_START_REQ( get_window_parents )
+        {
+            req->handle = wine_server_user_handle( hwnd );
+            wine_server_set_reply( req, list, (size-1) * sizeof(user_handle_t) );
+            if (!wine_server_call( req )) count = reply->count;
+        }
+        SERVER_END_REQ;
+        if (!count) goto empty;
+        if (size > count)
+        {
+            /* start from the end since HWND is potentially larger than user_handle_t */
+            for (i = count - 1; i >= 0; i--)
+                list[i] = wine_server_ptr_handle( ((user_handle_t *)list)[i] );
+            list[count] = 0;
+            return list;
+        }
+        free( list );
+        size = count + 1;
+        if (!(list = malloc( size * sizeof(HWND) ))) return NULL;
+    }
+
+empty:
+    free( list );
+    return NULL;
+}
+
+/*****************************************************************
+ *           NtUserGetAncestor (win32u.@)
+ */
+HWND WINAPI NtUserGetAncestor( HWND hwnd, UINT type )
+{
+    HWND *list, ret = 0;
+    WND *win;
+
+    switch(type)
+    {
+    case GA_PARENT:
+        if (!(win = get_win_ptr( hwnd )))
+        {
+            SetLastError( ERROR_INVALID_WINDOW_HANDLE );
+            return 0;
+        }
+        if (win == WND_DESKTOP) return 0;
+        if (win != WND_OTHER_PROCESS)
+        {
+            ret = win->parent;
+            release_win_ptr( win );
+        }
+        else /* need to query the server */
+        {
+            SERVER_START_REQ( get_window_tree )
+            {
+                req->handle = wine_server_user_handle( hwnd );
+                if (!wine_server_call_err( req )) ret = wine_server_ptr_handle( reply->parent );
+            }
+            SERVER_END_REQ;
+        }
+        break;
+
+    case GA_ROOT:
+        if (!(list = list_window_parents( hwnd ))) return 0;
+
+        if (!list[0] || !list[1]) ret = get_full_window_handle( hwnd );  /* top-level window */
+        else
+        {
+            int count = 2;
+            while (list[count]) count++;
+            ret = list[count - 2];  /* get the one before the desktop */
+        }
+        free( list );
+        break;
+
+    case GA_ROOTOWNER:
+        if (is_desktop_window( hwnd )) return 0;
+        ret = get_full_window_handle( hwnd );
+        for (;;)
+        {
+            HWND parent = get_parent( ret );
+            if (!parent) break;
+            ret = parent;
+        }
+        break;
+    }
+    return ret;
+}
+
 static LONG_PTR get_win_data( const void *ptr, UINT size )
 {
     if (size == sizeof(WORD))

dlls/wow64win/syscall.h

@@ -99,6 +99,7 @@
     SYSCALL_ENTRY( NtUserCreateWindowStation ) \
     SYSCALL_ENTRY( NtUserDestroyAcceleratorTable ) \
     SYSCALL_ENTRY( NtUserFindExistingCursorIcon ) \
+    SYSCALL_ENTRY( NtUserGetAncestor ) \
     SYSCALL_ENTRY( NtUserGetClipboardFormatName ) \
     SYSCALL_ENTRY( NtUserGetClipboardOwner ) \
     SYSCALL_ENTRY( NtUserGetClipboardSequenceNumber ) \

dlls/wow64win/user.c

@@ -189,6 +189,14 @@ NTSTATUS WINAPI wow64_NtUserRemoveProp( UINT *args )
     return HandleToUlong( NtUserRemoveProp( hwnd, str ));
 }
 
+NTSTATUS WINAPI wow64_NtUserGetAncestor( UINT *args )
+{
+    HWND hwnd = get_handle( &args );
+    UINT type = get_ulong( &args );
+
+    return HandleToUlong( NtUserGetAncestor( hwnd, type ));
+}
+
 NTSTATUS WINAPI wow64_NtUserBuildHwndList( UINT *args )
 {
     HDESK desktop = get_handle( &args );

include/ntuser.h

@@ -275,6 +275,7 @@ BOOL    WINAPI NtUserEnumDisplaySettings( UNICODE_STRING *device, DWORD mode,
                                           DEVMODEW *dev_mode, DWORD flags );
 HICON   WINAPI NtUserFindExistingCursorIcon( UNICODE_STRING *module, UNICODE_STRING *res_name,
                                              void *desc );
+HWND    WINAPI NtUserGetAncestor( HWND hwnd, UINT type );
 SHORT   WINAPI NtUserGetAsyncKeyState( INT key );
 ULONG   WINAPI NtUserGetAtomName( ATOM atom, UNICODE_STRING *name );
 ATOM    WINAPI NtUserGetClassInfoEx( HINSTANCE instance, UNICODE_STRING *name, WNDCLASSEXW *wc,