diff --git a/dlls/user32/win.c b/dlls/user32/win.c
index 4d4199c67fc..22227c23280 100644
--- a/dlls/user32/win.c
+++ b/dlls/user32/win.c
@@ -2249,17 +2249,7 @@ BOOL WINAPI FlashWindow( HWND hWnd, BOOL bInvert )
  */
 DWORD WINAPI GetWindowContextHelpId( HWND hwnd )
 {
-    DWORD retval;
-    WND *wnd = WIN_GetPtr( hwnd );
-    if (!wnd || wnd == WND_DESKTOP) return 0;
-    if (wnd == WND_OTHER_PROCESS)
-    {
-        if (IsWindow( hwnd )) FIXME( "not supported on other process window %p\n", hwnd );
-        return 0;
-    }
-    retval = wnd->helpContext;
-    WIN_ReleasePtr( wnd );
-    return retval;
+    return NtUserCallHwnd( hwnd, NtUserGetWindowContextHelpId );
 }
 
 
diff --git a/dlls/win32u/window.c b/dlls/win32u/window.c
index ab69096184c..e513a13b152 100644
--- a/dlls/win32u/window.c
+++ b/dlls/win32u/window.c
@@ -3913,6 +3913,22 @@ BOOL WINAPI NtUserFlashWindowEx( FLASHWINFO *info )
     }
 }
 
+/* see GetWindowContextHelpId */
+static DWORD get_window_context_help_id( HWND hwnd )
+{
+    DWORD retval;
+    WND *win = get_win_ptr( hwnd );
+    if (!win || win == WND_DESKTOP) return 0;
+    if (win == WND_OTHER_PROCESS)
+    {
+        if (is_window( hwnd )) FIXME( "not supported on other process window %p\n", hwnd );
+        return 0;
+    }
+    retval = win->helpContext;
+    release_win_ptr( win );
+    return retval;
+}
+
 /***********************************************************************
  *           send_destroy_message
  */
@@ -4190,6 +4206,8 @@ ULONG_PTR WINAPI NtUserCallHwnd( HWND hwnd, DWORD code )
         return get_dpi_for_window( hwnd );
     case NtUserGetParent:
         return HandleToUlong( get_parent( hwnd ));
+    case NtUserGetWindowContextHelpId:
+        return get_window_context_help_id( hwnd );
     case NtUserGetWindowDpiAwarenessContext:
         return (ULONG_PTR)get_window_dpi_awareness_context( hwnd );
     case NtUserGetWindowTextLength:
diff --git a/include/ntuser.h b/include/ntuser.h
index 6526d190e28..7bcb91fcc25 100644
--- a/include/ntuser.h
+++ b/include/ntuser.h
@@ -147,6 +147,7 @@ enum
 {
     NtUserGetDpiForWindow,
     NtUserGetParent,
+    NtUserGetWindowContextHelpId,
     NtUserGetWindowDpiAwarenessContext,
     NtUserGetWindowTextLength,
     NtUserIsWindow,