win32u: Use syscall interface for more user painting functions.

dlls/win32u/gdiobj.c

@@ -1136,7 +1136,6 @@ static struct unix_funcs unix_funcs =
     NtGdiUnrealizeObject,
     NtGdiUpdateColors,
     NtGdiWidenPath,
-    NtUserBeginPaint,
     NtUserCallHwnd,
     NtUserCallHwndParam,
     NtUserCallNextHookEx,
@@ -1171,30 +1170,23 @@ static struct unix_funcs unix_funcs =
     NtUserFlashWindowEx,
     NtUserGetClassInfoEx,
     NtUserGetClipboardData,
-    NtUserGetDCEx,
     NtUserGetDisplayConfigBufferSizes,
     NtUserGetIconInfo,
     NtUserGetMenuBarInfo,
     NtUserGetPriorityClipboardFormat,
     NtUserGetScrollBarInfo,
     NtUserGetSystemMenu,
-    NtUserGetUpdateRect,
-    NtUserGetUpdateRgn,
     NtUserGetUpdatedClipboardFormats,
     NtUserGetWindowPlacement,
     NtUserHideCaret,
     NtUserHiliteMenuItem,
     NtUserInternalGetWindowIcon,
-    NtUserInvalidateRect,
-    NtUserInvalidateRgn,
     NtUserIsClipboardFormatAvailable,
     NtUserMoveWindow,
     NtUserOpenClipboard,
-    NtUserRedrawWindow,
     NtUserRegisterClassExWOW,
     NtUserReleaseDC,
     NtUserScrollDC,
-    NtUserScrollWindowEx,
     NtUserSelectPalette,
     NtUserSetActiveWindow,
     NtUserSetCapture,

dlls/win32u/syscall.c

@@ -104,6 +104,7 @@ static void * const syscalls[] =
     NtUserAddClipboardFormatListener,
     NtUserAssociateInputContext,
     NtUserAttachThreadInput,
+    NtUserBeginPaint,
     NtUserBuildHwndList,
     NtUserCallMsgFilter,
     NtUserCheckMenuItem,
@@ -135,6 +136,7 @@ static void * const syscalls[] =
     NtUserGetCursor,
     NtUserGetCursorFrameInfo,
     NtUserGetCursorInfo,
+    NtUserGetDCEx,
     NtUserGetDoubleClickTime,
     NtUserGetDpiForMonitor,
     NtUserGetForegroundWindow,
@@ -164,9 +166,13 @@ static void * const syscalls[] =
     NtUserGetSystemDpiForProcess,
     NtUserGetThreadDesktop,
     NtUserGetTitleBarInfo,
+    NtUserGetUpdateRect,
+    NtUserGetUpdateRgn,
     NtUserGetWindowRgnEx,
     NtUserInitializeClientPfnArrays,
     NtUserInternalGetWindowText,
+    NtUserInvalidateRect,
+    NtUserInvalidateRgn,
     NtUserKillTimer,
     NtUserLockWindowUpdate,
     NtUserMapVirtualKeyEx,
@@ -181,11 +187,13 @@ static void * const syscalls[] =
     NtUserPostMessage,
     NtUserPostThreadMessage,
     NtUserQueryInputContext,
+    NtUserRedrawWindow,
     NtUserRegisterHotKey,
     NtUserRegisterRawInputDevices,
     NtUserRemoveClipboardFormatListener,
     NtUserRemoveMenu,
     NtUserRemoveProp,
+    NtUserScrollWindowEx,
     NtUserSendInput,
     NtUserSetCursorPos,
     NtUserSetKeyboardState,

dlls/win32u/win32u.spec

@@ -758,7 +758,7 @@
 @ stub NtUserAutoPromoteMouseInPointer
 @ stub NtUserAutoRotateScreen
 @ stub NtUserBeginLayoutUpdate
-@ stdcall NtUserBeginPaint(long ptr)
+@ stdcall -syscall NtUserBeginPaint(long ptr)
 @ stub NtUserBitBltSysBmp
 @ stub NtUserBlockInput
 @ stub NtUserBroadcastThemeChangeEvent
@@ -916,7 +916,7 @@
 @ stdcall -syscall NtUserGetCursorFrameInfo(long long ptr ptr)
 @ stdcall -syscall NtUserGetCursorInfo(ptr)
 @ stub NtUserGetDC
-@ stdcall NtUserGetDCEx(long long long)
+@ stdcall -syscall NtUserGetDCEx(long long long)
 @ stub NtUserGetDManipHookInitFunction
 @ stub NtUserGetDesktopID
 @ stub NtUserGetDisplayAutoRotationPreferences
@@ -1002,8 +1002,8 @@
 @ stub NtUserGetTouchInputInfo
 @ stub NtUserGetTouchValidationStatus
 @ stub NtUserGetUniformSpaceMapping
-@ stdcall NtUserGetUpdateRect(long ptr long)
-@ stdcall NtUserGetUpdateRgn(long long long)
+@ stdcall -syscall NtUserGetUpdateRect(long ptr long)
+@ stdcall -syscall NtUserGetUpdateRgn(long long long)
 @ stdcall NtUserGetUpdatedClipboardFormats(ptr long ptr)
 @ stub NtUserGetWOWClass
 @ stub NtUserGetWindowBand
@@ -1047,8 +1047,8 @@
 @ stdcall NtUserInternalGetWindowIcon(ptr long)
 @ stdcall -syscall NtUserInternalGetWindowText(long ptr long)
 @ stub NtUserInternalToUnicode
-@ stdcall NtUserInvalidateRect(long ptr long)
-@ stdcall NtUserInvalidateRgn(long long long)
+@ stdcall -syscall NtUserInvalidateRect(long ptr long)
+@ stdcall -syscall NtUserInvalidateRgn(long long long)
 @ stub NtUserIsChildWindowDpiMessageEnabled
 @ stdcall NtUserIsClipboardFormatAvailable(long)
 @ stub NtUserIsMouseInPointerEnabled
@@ -1120,7 +1120,7 @@
 @ stub NtUserRealChildWindowFromPoint
 @ stub NtUserRealInternalGetMessage
 @ stub NtUserRealWaitMessageEx
-@ stdcall NtUserRedrawWindow(long ptr long long)
+@ stdcall -syscall NtUserRedrawWindow(long ptr long long)
 @ stub NtUserRegisterBSDRWindow
 @ stdcall NtUserRegisterClassExWOW(ptr ptr ptr ptr long long long)
 @ stub NtUserRegisterDManipHook
@@ -1156,7 +1156,7 @@
 @ stub NtUserRestoreWindowDpiChanges
 @ stub NtUserSBGetParms
 @ stdcall NtUserScrollDC(long long long ptr ptr long ptr)
-@ stdcall NtUserScrollWindowEx(long long long ptr ptr long ptr long)
+@ stdcall -syscall NtUserScrollWindowEx(long long long ptr ptr long ptr long)
 @ stdcall NtUserSelectPalette(long long long)
 @ stub NtUserSendEventMessage
 @ stdcall -syscall NtUserSendInput(long ptr long)

dlls/win32u/win32u_private.h

@@ -186,7 +186,6 @@ struct unix_funcs
     BOOL     (WINAPI *pNtGdiUnrealizeObject)( HGDIOBJ obj );
     BOOL     (WINAPI *pNtGdiUpdateColors)( HDC hdc );
     BOOL     (WINAPI *pNtGdiWidenPath)( HDC hdc );
-    HDC      (WINAPI *pNtUserBeginPaint)( HWND hwnd, PAINTSTRUCT *ps );
     ULONG_PTR (WINAPI *pNtUserCallHwnd)( HWND hwnd, DWORD code );
     ULONG_PTR (WINAPI *pNtUserCallHwndParam)( HWND hwnd, DWORD_PTR param, DWORD code );
     LRESULT  (WINAPI *pNtUserCallNextHookEx)( HHOOK hhook, INT code, WPARAM wparam, LPARAM lparam );
@@ -233,7 +232,6 @@ struct unix_funcs
     ATOM     (WINAPI *pNtUserGetClassInfoEx)( HINSTANCE instance, UNICODE_STRING *name, WNDCLASSEXW *wc,
                                               struct client_menu_name *menu_name, BOOL ansi );
     HANDLE   (WINAPI *pNtUserGetClipboardData)( UINT format, struct get_clipboard_params *params );
-    HDC      (WINAPI *pNtUserGetDCEx)( HWND hwnd, HRGN clip_rgn, DWORD flags );
     LONG     (WINAPI *pNtUserGetDisplayConfigBufferSizes)( UINT32 flags, UINT32 *num_path_info,
                                                            UINT32 *num_mode_info );
     BOOL     (WINAPI *pNtUserGetIconInfo)( HICON icon, ICONINFO *info, UNICODE_STRING *module,
@@ -242,19 +240,14 @@ struct unix_funcs
     INT      (WINAPI *pNtUserGetPriorityClipboardFormat)( UINT *list, INT count );
     BOOL     (WINAPI *pNtUserGetScrollBarInfo)( HWND hwnd, LONG id, SCROLLBARINFO *info );
     HMENU    (WINAPI *pNtUserGetSystemMenu)( HWND hwnd, BOOL revert );
-    BOOL     (WINAPI *pNtUserGetUpdateRect)( HWND hwnd, RECT *rect, BOOL erase );
-    INT      (WINAPI *pNtUserGetUpdateRgn)( HWND hwnd, HRGN hrgn, BOOL erase );
     BOOL     (WINAPI *pNtUserGetUpdatedClipboardFormats)( UINT *formats, UINT size, UINT *out_size );
     BOOL     (WINAPI *pNtUserGetWindowPlacement)( HWND hwnd, WINDOWPLACEMENT *placement );
     BOOL     (WINAPI *pNtUserHideCaret)( HWND hwnd );
     BOOL     (WINAPI *pNtUserHiliteMenuItem)( HWND hwnd, HMENU handle, UINT item, UINT hilite );
     HICON    (WINAPI *pNtUserInternalGetWindowIcon)( HWND hwnd, UINT type );
-    BOOL     (WINAPI *pNtUserInvalidateRect)( HWND hwnd, const RECT *rect, BOOL erase );
-    BOOL     (WINAPI *pNtUserInvalidateRgn)( HWND hwnd, HRGN hrgn, BOOL erase );
     BOOL     (WINAPI *pNtUserIsClipboardFormatAvailable)( UINT format );
     BOOL     (WINAPI *pNtUserMoveWindow)( HWND hwnd, INT x, INT y, INT cx, INT cy, BOOL repaint );
     BOOL     (WINAPI *pNtUserOpenClipboard)( HWND hwnd, ULONG unk );
-    BOOL     (WINAPI *pNtUserRedrawWindow)( HWND hwnd, const RECT *rect, HRGN hrgn, UINT flags );
     ATOM     (WINAPI *pNtUserRegisterClassExWOW)( const WNDCLASSEXW *wc, UNICODE_STRING *name,
                                                   UNICODE_STRING *version,
                                                   struct client_menu_name *client_menu_name,
@@ -262,9 +255,6 @@ struct unix_funcs
     INT      (WINAPI *pNtUserReleaseDC)( HWND hwnd, HDC hdc );
     BOOL     (WINAPI *pNtUserScrollDC)( HDC hdc, INT dx, INT dy, const RECT *scroll, const RECT *clip,
                                         HRGN ret_update_rgn, RECT *update_rect );
-    INT      (WINAPI *pNtUserScrollWindowEx)( HWND hwnd, INT dx, INT dy, const RECT *rect,
-                                              const RECT *clip_rect, HRGN update_rgn,
-                                              RECT *update_rect, UINT flags );
     HPALETTE (WINAPI *pNtUserSelectPalette)( HDC hdc, HPALETTE hpal, WORD bkg );
     HWND     (WINAPI *pNtUserSetActiveWindow)( HWND hwnd );
     HWND     (WINAPI *pNtUserSetCapture)( HWND hwnd );

dlls/win32u/wrappers.c

@@ -725,12 +725,6 @@ NTSTATUS WINAPI NtGdiDdDDISetVidPnSourceOwner( const D3DKMT_SETVIDPNSOURCEOWNER
     return unix_funcs->pNtGdiDdDDISetVidPnSourceOwner( desc );
 }
 
-HDC WINAPI NtUserBeginPaint( HWND hwnd, PAINTSTRUCT *ps )
-{
-    if (!unix_funcs) return 0;
-    return unix_funcs->pNtUserBeginPaint( hwnd, ps );
-}
-
 LRESULT WINAPI NtUserCallNextHookEx( HHOOK hhook, INT code, WPARAM wparam, LPARAM lparam )
 {
     if (!unix_funcs) return 0;
@@ -944,12 +938,6 @@ HANDLE WINAPI NtUserGetClipboardData( UINT format, struct get_clipboard_params *
     return unix_funcs->pNtUserGetClipboardData( format, params );
 }
 
-HDC WINAPI NtUserGetDCEx( HWND hwnd, HRGN clip_rgn, DWORD flags )
-{
-    if (!unix_funcs) return 0;
-    return unix_funcs->pNtUserGetDCEx( hwnd, clip_rgn, flags );
-}
-
 LONG WINAPI NtUserGetDisplayConfigBufferSizes( UINT32 flags, UINT32 *num_path_info,
                                                UINT32 *num_mode_info )
 {
@@ -976,18 +964,6 @@ HMENU WINAPI NtUserGetSystemMenu( HWND hwnd, BOOL revert )
     return unix_funcs->pNtUserGetSystemMenu( hwnd, revert );
 }
 
-BOOL WINAPI NtUserGetUpdateRect( HWND hwnd, RECT *rect, BOOL erase )
-{
-    if (!unix_funcs) return FALSE;
-    return unix_funcs->pNtUserGetUpdateRect( hwnd, rect, erase );
-}
-
-INT WINAPI NtUserGetUpdateRgn( HWND hwnd, HRGN hrgn, BOOL erase )
-{
-    if (!unix_funcs) return 0;
-    return unix_funcs->pNtUserGetUpdateRgn( hwnd, hrgn, erase );
-}
-
 BOOL WINAPI NtUserHideCaret( HWND hwnd )
 {
     if (!unix_funcs) return FALSE;
@@ -1037,18 +1013,6 @@ HICON WINAPI NtUserInternalGetWindowIcon( HWND hwnd, UINT type )
     return unix_funcs->pNtUserInternalGetWindowIcon( hwnd, type );
 }
 
-BOOL WINAPI NtUserInvalidateRect( HWND hwnd, const RECT *rect, BOOL erase )
-{
-    if (!unix_funcs) return FALSE;
-    return unix_funcs->pNtUserInvalidateRect( hwnd, rect, erase );
-}
-
-BOOL WINAPI NtUserInvalidateRgn( HWND hwnd, HRGN hrgn, BOOL erase )
-{
-    if (!unix_funcs) return FALSE;
-    return unix_funcs->pNtUserInvalidateRgn( hwnd, hrgn, erase );
-}
-
 BOOL WINAPI NtUserIsClipboardFormatAvailable( UINT format )
 {
     if (!unix_funcs) return FALSE;
@@ -1061,12 +1025,6 @@ BOOL WINAPI NtUserOpenClipboard( HWND hwnd, ULONG unk )
     return unix_funcs->pNtUserOpenClipboard( hwnd, unk );
 }
 
-BOOL WINAPI NtUserRedrawWindow( HWND hwnd, const RECT *rect, HRGN hrgn, UINT flags )
-{
-    if (!unix_funcs) return FALSE;
-    return unix_funcs->pNtUserRedrawWindow( hwnd, rect, hrgn, flags );
-}
-
 ATOM WINAPI NtUserRegisterClassExWOW( const WNDCLASSEXW *wc, UNICODE_STRING *name, UNICODE_STRING *version,
                                       struct client_menu_name *client_menu_name, DWORD fnid, DWORD flags,
                                       DWORD *wow )
@@ -1088,15 +1046,6 @@ BOOL WINAPI NtUserScrollDC( HDC hdc, INT dx, INT dy, const RECT *scroll, const R
     return unix_funcs->pNtUserScrollDC( hdc, dx, dy, scroll, clip, ret_update_rgn, update_rect );
 }
 
-INT WINAPI NtUserScrollWindowEx( HWND hwnd, INT dx, INT dy, const RECT *rect,
-                                 const RECT *clip_rect, HRGN update_rgn,
-                                 RECT *update_rect, UINT flags )
-{
-    if (!unix_funcs) return 0;
-    return unix_funcs->pNtUserScrollWindowEx( hwnd, dx, dy, rect, clip_rect,
-                                              update_rgn, update_rect, flags );
-}
-
 HPALETTE WINAPI NtUserSelectPalette( HDC hdc, HPALETTE hpal, WORD bkg )
 {
     if (!unix_funcs) return 0;

dlls/wow64win/syscall.h

@@ -91,6 +91,7 @@
     SYSCALL_ENTRY( NtUserAddClipboardFormatListener ) \
     SYSCALL_ENTRY( NtUserAssociateInputContext ) \
     SYSCALL_ENTRY( NtUserAttachThreadInput ) \
+    SYSCALL_ENTRY( NtUserBeginPaint ) \
     SYSCALL_ENTRY( NtUserBuildHwndList ) \
     SYSCALL_ENTRY( NtUserCallMsgFilter ) \
     SYSCALL_ENTRY( NtUserCheckMenuItem ) \
@@ -122,6 +123,7 @@
     SYSCALL_ENTRY( NtUserGetCursor ) \
     SYSCALL_ENTRY( NtUserGetCursorFrameInfo ) \
     SYSCALL_ENTRY( NtUserGetCursorInfo ) \
+    SYSCALL_ENTRY( NtUserGetDCEx ) \
     SYSCALL_ENTRY( NtUserGetDoubleClickTime ) \
     SYSCALL_ENTRY( NtUserGetDpiForMonitor ) \
     SYSCALL_ENTRY( NtUserGetForegroundWindow ) \
@@ -151,9 +153,13 @@
     SYSCALL_ENTRY( NtUserGetSystemDpiForProcess ) \
     SYSCALL_ENTRY( NtUserGetThreadDesktop ) \
     SYSCALL_ENTRY( NtUserGetTitleBarInfo ) \
+    SYSCALL_ENTRY( NtUserGetUpdateRect ) \
+    SYSCALL_ENTRY( NtUserGetUpdateRgn ) \
     SYSCALL_ENTRY( NtUserGetWindowRgnEx ) \
     SYSCALL_ENTRY( NtUserInitializeClientPfnArrays ) \
     SYSCALL_ENTRY( NtUserInternalGetWindowText ) \
+    SYSCALL_ENTRY( NtUserInvalidateRect ) \
+    SYSCALL_ENTRY( NtUserInvalidateRgn ) \
     SYSCALL_ENTRY( NtUserKillTimer ) \
     SYSCALL_ENTRY( NtUserLockWindowUpdate ) \
     SYSCALL_ENTRY( NtUserMapVirtualKeyEx ) \
@@ -168,11 +174,13 @@
     SYSCALL_ENTRY( NtUserPostMessage ) \
     SYSCALL_ENTRY( NtUserPostThreadMessage ) \
     SYSCALL_ENTRY( NtUserQueryInputContext ) \
+    SYSCALL_ENTRY( NtUserRedrawWindow ) \
     SYSCALL_ENTRY( NtUserRegisterHotKey ) \
     SYSCALL_ENTRY( NtUserRegisterRawInputDevices ) \
     SYSCALL_ENTRY( NtUserRemoveClipboardFormatListener ) \
     SYSCALL_ENTRY( NtUserRemoveMenu ) \
     SYSCALL_ENTRY( NtUserRemoveProp ) \
+    SYSCALL_ENTRY( NtUserScrollWindowEx ) \
     SYSCALL_ENTRY( NtUserSendInput ) \
     SYSCALL_ENTRY( NtUserSetCursorPos ) \
     SYSCALL_ENTRY( NtUserSetKeyboardState ) \

dlls/wow64win/user.c

@@ -108,6 +108,16 @@ typedef struct
     } DUMMYUNIONNAME;
 } INPUT32;
 
+typedef struct
+{
+    UINT32 hdc;
+    BOOL   fErase;
+    RECT   rcPaint;
+    BOOL   fRestore;
+    BOOL   fIncUpdate;
+    BYTE   rgbReserved[32];
+} PAINTSTRUCT32;
+
 static MSG *msg_32to64( MSG *msg, const MSG32 *msg32 )
 {
     if (!msg32) return NULL;
@@ -167,6 +177,24 @@ NTSTATUS WINAPI wow64_NtUserAttachThreadInput( UINT *args )
     return NtUserAttachThreadInput( from, to, attach );
 }
 
+NTSTATUS WINAPI wow64_NtUserBeginPaint( UINT *args )
+{
+    HWND hwnd = get_handle( &args );
+    PAINTSTRUCT32 *ps32 = get_ptr( &args );
+
+    PAINTSTRUCT ps;
+    HDC ret;
+
+    ret = NtUserBeginPaint( hwnd, ps32 ? & ps : NULL );
+    if (ret && ps32)
+    {
+        ps32->hdc = HandleToUlong( ps.hdc );
+        ps32->fErase  = ps.fErase;
+        ps32->rcPaint = ps.rcPaint;
+    }
+    return HandleToUlong( ret );
+}
+
 NTSTATUS WINAPI wow64_NtUserBuildHwndList( UINT *args )
 {
     HDESK desktop = get_handle( &args );
@@ -470,6 +498,15 @@ NTSTATUS WINAPI wow64_NtUserGetCursorInfo( UINT *args )
     return TRUE;
 }
 
+NTSTATUS WINAPI wow64_NtUserGetDCEx( UINT *args )
+{
+    HWND hwnd = get_handle( &args );
+    HRGN clip_rgn = get_handle( &args );
+    DWORD flags = get_ulong( &args );
+
+    return HandleToUlong( NtUserGetDCEx( hwnd, clip_rgn, flags ));
+}
+
 NTSTATUS WINAPI wow64_NtUserGetDoubleClickTime( UINT *args )
 {
     return NtUserGetDoubleClickTime();
@@ -897,6 +934,24 @@ NTSTATUS WINAPI wow64_NtUserGetTitleBarInfo( UINT *args )
     return NtUserGetTitleBarInfo( hwnd, info );
 }
 
+NTSTATUS WINAPI wow64_NtUserGetUpdateRect( UINT *args )
+{
+    HWND hwnd = get_handle( &args );
+    RECT *rect = get_ptr( &args );
+    BOOL erase = get_ulong( &args );
+
+    return NtUserGetUpdateRect( hwnd, rect, erase );
+}
+
+NTSTATUS WINAPI wow64_NtUserGetUpdateRgn( UINT *args )
+{
+    HWND hwnd = get_handle( &args );
+    HRGN hrgn = get_handle( &args );
+    BOOL erase = get_ulong( &args );
+
+    return NtUserGetUpdateRgn( hwnd, hrgn, erase );
+}
+
 NTSTATUS WINAPI wow64_NtUserGetWindowRgnEx( UINT *args )
 {
     HWND hwnd = get_handle( &args );
@@ -921,6 +976,24 @@ NTSTATUS WINAPI wow64_NtUserInternalGetWindowText( UINT *args )
     return NtUserInternalGetWindowText( hwnd, text, count );
 }
 
+NTSTATUS WINAPI wow64_NtUserInvalidateRect( UINT *args )
+{
+    HWND hwnd = get_handle( &args );
+    const RECT *rect = get_ptr( &args );
+    BOOL erase = get_ulong( &args );
+
+    return NtUserInvalidateRect( hwnd, rect, erase );
+}
+
+NTSTATUS WINAPI wow64_NtUserInvalidateRgn( UINT *args )
+{
+    HWND hwnd = get_handle( &args );
+    HRGN hrgn = get_handle( &args );
+    BOOL erase = get_ulong( &args );
+
+    return NtUserInvalidateRgn( hwnd, hrgn, erase );
+}
+
 NTSTATUS WINAPI wow64_NtUserKillTimer( UINT *args )
 {
     HWND hwnd = get_handle( &args );
@@ -1075,6 +1148,16 @@ NTSTATUS WINAPI wow64_NtUserQueryInputContext( UINT *args )
     return NtUserQueryInputContext( handle, attr );
 }
 
+NTSTATUS WINAPI wow64_NtUserRedrawWindow( UINT *args )
+{
+    HWND hwnd = get_handle( &args );
+    const RECT *rect = get_ptr( &args );
+    HRGN hrgn = get_handle( &args );
+    UINT flags = get_ulong( &args );
+
+    return NtUserRedrawWindow( hwnd, rect, hrgn, flags );
+}
+
 NTSTATUS WINAPI wow64_NtUserRegisterHotKey( UINT *args )
 {
     HWND hwnd = get_handle( &args );
@@ -1141,6 +1224,20 @@ NTSTATUS WINAPI wow64_NtUserRemoveProp( UINT *args )
     return HandleToUlong( NtUserRemoveProp( hwnd, str ));
 }
 
+NTSTATUS WINAPI wow64_NtUserScrollWindowEx( UINT *args )
+{
+    HWND hwnd = get_handle( &args );
+    INT dx = get_ulong( &args );
+    INT dy = get_ulong( &args );
+    const RECT *rect = get_ptr( &args );
+    const RECT *clip_rect = get_ptr( &args );
+    HRGN update_rgn = get_handle( &args );
+    RECT *update_rect = get_ptr( &args );
+    UINT flags = get_ulong( &args );
+
+    return NtUserScrollWindowEx( hwnd, dx, dy, rect, clip_rect, update_rgn, update_rect, flags );
+}
+
 NTSTATUS WINAPI wow64_NtUserSendInput( UINT *args )
 {
     UINT count = get_ulong( &args );