From 487163ac866cc3b9ff364bb5b3cb5a10835ea78b Mon Sep 17 00:00:00 2001
From: Andrew Innes <andrewi@gnu.org>
Date: Thu, 20 May 1999 20:42:58 +0000
Subject: [PATCH] (w32_wnd_proc): Ensure mouse capture is released if frame
 loses focus, and that mouse button state is reset.  Ditto when the menu bar
 is activated.

---
 src/w32fns.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/src/w32fns.c b/src/w32fns.c
index b54e56e3c56..201fbb3fc76 100644
--- a/src/w32fns.c
+++ b/src/w32fns.c
@@ -4237,6 +4237,8 @@ w32_wnd_proc (hwnd, msg, wParam, lParam)
       goto dflt;
 
     case WM_INITMENU:
+      button_state = 0;
+      ReleaseCapture ();
       /* We must ensure menu bar is fully constructed and up to date
 	 before allowing user interaction with it.  To achieve this
 	 we send this message to the lisp thread and wait for a
@@ -4382,6 +4384,8 @@ w32_wnd_proc (hwnd, msg, wParam, lParam)
       goto command;
     case WM_KILLFOCUS:
       unregister_hot_keys (hwnd);
+      button_state = 0;
+      ReleaseCapture ();
     case WM_MOVE:
     case WM_SIZE:
     case WM_COMMAND:
-- 
2.39.5