Fix bug #11513 with raise-frame on MS-Windows.

 src/w32term.c (my_bring_window_to_top): New function.
 (x_raise_frame): Use handle returned by DeferWindowPos, which
 could be different from the original one.  Call
 my_bring_window_to_top instead of my_set_foreground_window.
 src/w32fns.c (w32_wnd_proc): Accept and process WM_EMACS_BRINGTOTOP
 by calling BringWindowToTop.
 src/w32term.h (WM_EMACS_BRINGTOTOP): New message.
 (WM_EMACS_END): Increase by one.

1 files changed, 23 insertions, 14 deletions

diff --git a/src/w32term.c b/src/w32term.c
index 2ccd7574332..a90e067a3fd 100644
--- a/src/w32term.c
+++ b/src/w32term.c
@@ -3492,6 +3492,12 @@ my_destroy_window (struct frame * f, HWND hwnd)
                (WPARAM) hwnd, 0);
 }
 
+static void
+my_bring_window_to_top (HWND hwnd)
+{
+  SendMessage (hwnd, WM_EMACS_BRINGTOTOP, (WPARAM) hwnd, 0);
+}
+
 /* Create a scroll bar and return the scroll bar vector for it.  W is
    the Emacs window on which to create the scroll bar. TOP, LEFT,
    WIDTH and HEIGHT are the pixel coordinates and dimensions of the
@@ -5600,24 +5606,27 @@ x_raise_frame (struct frame *f)
       HDWP handle = BeginDeferWindowPos (2);
       if (handle)
         {
-          DeferWindowPos (handle,
-                          FRAME_W32_WINDOW (f),
-                          HWND_TOP,
-                          0, 0, 0, 0,
-                          SWP_NOSIZE | SWP_NOMOVE | SWP_NOACTIVATE);
-
-          DeferWindowPos (handle,
-                          GetForegroundWindow (),
-                          FRAME_W32_WINDOW (f),
-                          0, 0, 0, 0,
-                          SWP_NOSIZE | SWP_NOMOVE | SWP_NOACTIVATE);
-
-          EndDeferWindowPos (handle);
+          handle = DeferWindowPos (handle,
+                                   FRAME_W32_WINDOW (f),
+                                   HWND_TOP,
+                                   0, 0, 0, 0,
+                                   SWP_NOSIZE | SWP_NOMOVE | SWP_NOACTIVATE);
+          if (handle)
+            {
+              handle = DeferWindowPos (handle,
+                                       GetForegroundWindow (),
+                                       FRAME_W32_WINDOW (f),
+                                       0, 0, 0, 0,
+                                       SWP_NOSIZE | SWP_NOMOVE |
+                                       SWP_NOACTIVATE);
+              if (handle)
+                EndDeferWindowPos (handle);
+            }
         }
     }
   else
     {
-      my_set_foreground_window (FRAME_W32_WINDOW (f));
+      my_bring_window_to_top (FRAME_W32_WINDOW (f));
     }
 
   UNBLOCK_INPUT;