win32u: Move NtUserRealChildWindowFromPoint implementation from user32.

dlls/user32/winpos.c

@@ -107,8 +107,7 @@ HWND WINAPI ChildWindowFromPoint( HWND parent, POINT pt )
  */
 HWND WINAPI RealChildWindowFromPoint( HWND parent, POINT pt )
 {
-    return NtUserChildWindowFromPointEx( parent, pt.x, pt.y,
-                                         CWP_SKIPTRANSPARENT | CWP_SKIPINVISIBLE );
+    return NtUserRealChildWindowFromPoint( parent, pt.x, pt.y );
 }
 
 /*******************************************************************

dlls/win32u/syscall.c

@@ -239,6 +239,7 @@ static void * const syscalls[] =
     NtUserPostThreadMessage,
     NtUserPrintWindow,
     NtUserQueryInputContext,
+    NtUserRealChildWindowFromPoint,
     NtUserRedrawWindow,
     NtUserRegisterClassExWOW,
     NtUserRegisterHotKey,

dlls/win32u/win32u.spec

@@ -1117,7 +1117,7 @@
 @ stdcall -syscall NtUserQueryInputContext(long long)
 @ stub NtUserQuerySendMessage
 @ stub NtUserQueryWindow
-@ stub NtUserRealChildWindowFromPoint
+@ stdcall -syscall NtUserRealChildWindowFromPoint(long long long)
 @ stub NtUserRealInternalGetMessage
 @ stub NtUserRealWaitMessageEx
 @ stdcall -syscall NtUserRedrawWindow(long ptr long long)

dlls/win32u/window.c

@@ -2297,6 +2297,14 @@ HWND WINAPI NtUserChildWindowFromPointEx( HWND parent, LONG x, LONG y, UINT flag
 }
 
 /*******************************************************************
+ *           NtUserRealChildWindowFromPoint (win32u.@)
+ */
+HWND WINAPI NtUserRealChildWindowFromPoint( HWND parent, LONG x, LONG y )
+{
+    return NtUserChildWindowFromPointEx( parent, x, y, CWP_SKIPTRANSPARENT | CWP_SKIPINVISIBLE );
+}
+
+/*******************************************************************
  *           get_work_rect
  *
  * Get the work area that a maximized window can cover, depending on style.

dlls/wow64win/syscall.h

@@ -225,6 +225,7 @@
     SYSCALL_ENTRY( NtUserPostThreadMessage ) \
     SYSCALL_ENTRY( NtUserPrintWindow ) \
     SYSCALL_ENTRY( NtUserQueryInputContext ) \
+    SYSCALL_ENTRY( NtUserRealChildWindowFromPoint ) \
     SYSCALL_ENTRY( NtUserRedrawWindow ) \
     SYSCALL_ENTRY( NtUserRegisterClassExWOW ) \
     SYSCALL_ENTRY( NtUserRegisterHotKey ) \

dlls/wow64win/user.c

@@ -2423,6 +2423,15 @@ NTSTATUS WINAPI wow64_NtUserGetRawInputDeviceList( UINT *args )
     }
 }
 
+NTSTATUS WINAPI wow64_NtUserRealChildWindowFromPoint( UINT *args )
+{
+    HWND parent = get_handle( &args );
+    LONG x = get_ulong( &args );
+    LONG y = get_ulong( &args );
+
+    return HandleToUlong( NtUserRealChildWindowFromPoint( parent, x, y ));
+}
+
 NTSTATUS WINAPI wow64_NtUserRegisterClassExWOW( UINT *args )
 {
     const WNDCLASSEXW32 *wc32 = get_ptr( &args );

include/ntuser.h

@@ -812,6 +812,7 @@ BOOL    WINAPI NtUserPostMessage( HWND hwnd, UINT msg, WPARAM wparam, LPARAM lpa
 BOOL    WINAPI NtUserPostThreadMessage( DWORD thread, UINT msg, WPARAM wparam, LPARAM lparam );
 BOOL    WINAPI NtUserPrintWindow( HWND hwnd, HDC hdc, UINT flags );
 UINT_PTR WINAPI NtUserQueryInputContext( HIMC handle, UINT attr );
+HWND    WINAPI NtUserRealChildWindowFromPoint( HWND parent, LONG x, LONG y );
 BOOL    WINAPI NtUserRedrawWindow( HWND hwnd, const RECT *rect, HRGN hrgn, UINT flags );
 ATOM    WINAPI NtUserRegisterClassExWOW( const WNDCLASSEXW *wc, UNICODE_STRING *name, UNICODE_STRING *version,
                                          struct client_menu_name *client_menu_name, DWORD fnid, DWORD flags,