diff --git a/win/rfb_win32/LowLevelKeyEvents.cxx b/win/rfb_win32/LowLevelKeyEvents.cxx
new file mode 100644
index 0000000..322d1f4
--- /dev/null
+++ b/win/rfb_win32/LowLevelKeyEvents.cxx
@@ -0,0 +1,96 @@
+/* Copyright (C) 2002-2005 RealVNC Ltd.  All Rights Reserved.
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+
+#include <windows.h>
+#include <rfb_win32/LowLevelKeyEvents.h>
+#include <rfb/Threading.h>
+#include <rfb/LogWriter.h>
+#include <list>
+
+using namespace rfb;
+using namespace win32;
+
+static LogWriter vlog("LowLevelKeyEvents");
+
+
+HHOOK hook = 0;
+std::list<HWND> windows;
+Mutex windowLock;
+
+
+static bool filterKeyEvent(int vkCode) {
+  switch (vkCode) {
+  case VK_LWIN:
+  case VK_RWIN:
+  case VK_SNAPSHOT:
+    return true;
+  case VK_TAB:
+    if (GetAsyncKeyState(VK_MENU) & 0x8000)
+      return true;
+  case VK_ESCAPE:
+    if (GetAsyncKeyState(VK_MENU) & 0x8000)
+      return true;
+    if (GetAsyncKeyState(VK_CONTROL) & 0x8000)
+      return true;
+  }
+  return false;
+}
+
+LRESULT CALLBACK LowLevelKeyEventProc(int nCode,
+                                      WPARAM wParam,
+                                      LPARAM lParam) {
+  if (nCode >= 0) {
+    Lock l(windowLock);
+    HWND foreground = GetForegroundWindow();
+    std::list<HWND>::iterator i;
+    for (i=windows.begin(); i!=windows.end(); i++) {
+      if (*i == foreground) {
+        UINT msgType = wParam;
+        KBDLLHOOKSTRUCT* msgInfo = (KBDLLHOOKSTRUCT*)lParam;
+        if (filterKeyEvent(msgInfo->vkCode)) {
+          vlog.debug("filtered event %lx(%lu) %lu", msgInfo->vkCode, msgInfo->vkCode, wParam);
+          PostMessage(*i, wParam, msgInfo->vkCode, (msgInfo->scanCode & 0xff) << 16);
+          return 1;
+        }
+      }
+    }
+  }
+  return CallNextHookEx(hook, nCode, wParam, lParam);
+}
+
+
+bool rfb::win32::enableLowLevelKeyEvents(HWND hwnd) {
+// ***  return false; // *** THIS CODE IS EXPERIMENTAL, SO DISABLED BY DEFAULT!
+  Lock l(windowLock);
+  if (windows.empty() && !hook)
+    hook = SetWindowsHookEx(WH_KEYBOARD_LL, &LowLevelKeyEventProc, GetModuleHandle(0), 0);
+  if (hook)
+    windows.push_back(hwnd);
+  vlog.debug("enable %p -> %s", hwnd, hook ? "success" : "failure");
+  return hook != 0;
+}
+
+void rfb::win32::disableLowLevelKeyEvents(HWND hwnd) {
+  vlog.debug("disable %p", hwnd);
+  Lock l(windowLock);
+  windows.remove(hwnd);
+  if (windows.empty() && hook) {
+    UnhookWindowsHookEx(hook);
+    hook = 0;
+  }
+}