From 5fe9a1a85ae6d54196031157a735352f6ab655ff Mon Sep 17 00:00:00 2001
From: Eli Zaretskii <eliz@gnu.org>
Date: Thu, 15 Sep 2022 09:12:13 +0300
Subject: [PATCH] ; Fix doc string of 'loaddefs-generate'

* lisp/emacs-lisp/loaddefs-gen.el (loaddefs-generate): Doc fix.
(Bug#57815)
---
 lisp/emacs-lisp/loaddefs-gen.el |  4 +--
 src/w32fns.c                    | 45 +++++++++++++++++++++++++++++++++
 2 files changed, 47 insertions(+), 2 deletions(-)

diff --git a/lisp/emacs-lisp/loaddefs-gen.el b/lisp/emacs-lisp/loaddefs-gen.el
index 005a46c2d75..5819a26eb54 100644
--- a/lisp/emacs-lisp/loaddefs-gen.el
+++ b/lisp/emacs-lisp/loaddefs-gen.el
@@ -512,7 +512,7 @@ If COMPILE, don't include a \"don't compile\" cookie."
 (defun loaddefs-generate (dir output-file &optional excluded-files
                               extra-data include-package-version
                               generate-full)
-  "Generate loaddefs files for Lisp files in the directories DIRS.
+  "Generate loaddefs files for Lisp files in one or more directories given by DIR.
 DIR can be either a single directory or a list of directories.
 
 The autoloads will be written to OUTPUT-FILE.  If any Lisp file
@@ -520,7 +520,7 @@ binds `generated-autoload-file' as a file-local variable, write
 its autoloads into the specified file instead.
 
 The function does NOT recursively descend into subdirectories of the
-directory or directories specified by DIRS.
+directories specified by DIR.
 
 Optional argument EXCLUDED-FILES, if non-nil, should be a list of
 files, such as preloaded files, whose autoloads should not be written
diff --git a/src/w32fns.c b/src/w32fns.c
index 745458d0a03..57296bd4e07 100644
--- a/src/w32fns.c
+++ b/src/w32fns.c
@@ -10447,6 +10447,51 @@ w32_get_resource (const char *key, const char *name, LPDWORD lpdwtype)
   return (NULL);
 }
 
+#ifdef WINDOWSNT
+
+/***********************************************************************
+			    Wallpaper
+ ***********************************************************************/
+
+#if 0
+
+typedef BOOL (WINAPI * SystemParametersInfoW_Proc) (UINT,UINT,PVOID,UINT);
+static SystemParametersInfoW_Proc system_parameters_info_w_fn;
+
+DEFUN ("w32-set-wallpaper", Fw32_set_wallpaper, Sw32_set_wallpaper, 1, 1, 0,
+       doc: /* Set the desktop wallpaper image to IMAGE-FILE. */)
+  (Lisp_Object image_file)
+{
+  Lisp_Object encoded = ENCODE_FILE (Fexpand_file_name (image_file, Qnil));
+  char *fname = SSDATA (encoded);
+
+  if (w32_unicode_filenames)
+    {
+    }
+  else
+    {
+      char fname_a[MAX_PATH];
+
+      if (filename_to_ansi (fname, fname_a) != 0)
+	error ("Wallpaper file %s does not exist or cannot be accessed", fname);
+
+      BOOL result = SystemParametersInfoA (SPI_SETDESKWALLPAPER, 0, fname_a,
+					   SPIF_SENDCHANGE);
+      if (!result)
+	{
+	  DWORD err = GetLastError ();
+	  if (err)
+	    error ("Could not set wallpaper: %s", w32_strerror (err));
+	  else
+	    error ("Could not set wallpaper");
+	}
+    }
+  return Qnil;
+}
+#endif
+
+#endif
+
 /***********************************************************************
 			    Initialization
  ***********************************************************************/
-- 
2.39.2