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diff --git a/src/lib/platform/MSWindowsKeyState.h b/src/lib/platform/MSWindowsKeyState.h
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+++ b/src/lib/platform/MSWindowsKeyState.h
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+/*
+ * barrier -- mouse and keyboard sharing utility
+ * Copyright (C) 2012-2016 Symless Ltd.
+ * Copyright (C) 2003 Chris Schoeneman
+ * 
+ * This package is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * found in the file LICENSE that should have accompanied this file.
+ * 
+ * This package 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 program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#pragma once
+
+#include "barrier/KeyState.h"
+#include "base/String.h"
+#include "common/stdvector.h"
+
+#define WIN32_LEAN_AND_MEAN
+#include <Windows.h>
+
+class Event;
+class EventQueueTimer;
+class MSWindowsDesks;
+class IEventQueue;
+
+//! Microsoft Windows key mapper
+/*!
+This class maps KeyIDs to keystrokes.
+*/
+class MSWindowsKeyState : public KeyState {
+public:
+	MSWindowsKeyState(MSWindowsDesks* desks, void* eventTarget, IEventQueue* events);
+	MSWindowsKeyState(MSWindowsDesks* desks, void* eventTarget, IEventQueue* events, barrier::KeyMap& keyMap);
+	virtual ~MSWindowsKeyState();
+
+	//! @name manipulators
+	//@{
+
+	//! Handle screen disabling
+	/*!
+	Called when screen is disabled.  This is needed to deal with platform
+	brokenness.
+	*/
+	void				disable();
+
+	//! Set the active keyboard layout
+	/*!
+	Uses \p keyLayout when querying the keyboard.
+	*/
+	void				setKeyLayout(HKL keyLayout);
+
+	//! Test and set autorepeat state
+	/*!
+	Returns true if the given button is autorepeating and updates internal
+	state.
+	*/
+	bool				testAutoRepeat(bool press, bool isRepeat, KeyButton);
+
+	//! Remember modifier state
+	/*!
+	Records the current non-toggle modifier state.
+	*/
+	void				saveModifiers();
+
+	//! Set effective modifier state
+	/*!
+	Temporarily sets the non-toggle modifier state to those saved by the
+	last call to \c saveModifiers if \p enable is \c true.  Restores the
+	modifier state to the current modifier state if \p enable is \c false.
+	This is for synthesizing keystrokes on the primary screen when the
+	cursor is on a secondary screen.  When on a secondary screen we capture
+	all non-toggle modifier state, track the state internally and do not
+	pass it on.  So if Alt+F1 synthesizes Alt+X we need to synthesize
+	not just X but also Alt, despite the fact that our internal modifier
+	state indicates Alt is down, because local apps never saw the Alt down
+	event.
+	*/
+	void				useSavedModifiers(bool enable);
+
+	//@}
+	//! @name accessors
+	//@{
+
+	//! Map a virtual key to a button
+	/*!
+	Returns the button for the \p virtualKey.
+	*/
+	KeyButton			virtualKeyToButton(UINT virtualKey) const;
+
+	//! Map key event to a key
+	/*!
+	Converts a key event into a KeyID and the shadow modifier state
+	to a modifier mask.
+	*/
+	KeyID				mapKeyFromEvent(WPARAM charAndVirtKey,
+							LPARAM info, KeyModifierMask* maskOut) const;
+
+	//! Check if keyboard groups have changed
+	/*!
+	Returns true iff the number or order of the keyboard groups have
+	changed since the last call to updateKeys().
+	*/
+	bool				didGroupsChange() const;
+
+	//! Map key to virtual key
+	/*!
+	Returns the virtual key for key \p key or 0 if there's no such virtual
+	key.
+	*/
+	UINT				mapKeyToVirtualKey(KeyID key) const;
+
+	//! Map virtual key and button to KeyID
+	/*!
+	Returns the KeyID for virtual key \p virtualKey and button \p button
+	(button should include the extended key bit), or kKeyNone if there is
+	no such key.
+	*/
+	KeyID				getKeyID(UINT virtualKey, KeyButton button) const;
+
+	//! Map button to virtual key
+	/*!
+	Returns the virtual key for button \p button
+	(button should include the extended key bit), or kKeyNone if there is
+	no such key.
+	*/
+	UINT				mapButtonToVirtualKey(KeyButton button) const;
+
+	//@}
+
+	// IKeyState overrides
+	virtual void		fakeKeyDown(KeyID id, KeyModifierMask mask,
+							KeyButton button);
+	virtual bool		fakeKeyRepeat(KeyID id, KeyModifierMask mask,
+							SInt32 count, KeyButton button);
+	virtual bool		fakeCtrlAltDel();
+	virtual KeyModifierMask
+						pollActiveModifiers() const;
+	virtual SInt32		pollActiveGroup() const;
+	virtual void		pollPressedKeys(KeyButtonSet& pressedKeys) const;
+
+	// KeyState overrides
+	virtual void		onKey(KeyButton button, bool down,
+							KeyModifierMask newState);
+	virtual void		sendKeyEvent(void* target,
+							bool press, bool isAutoRepeat,
+							KeyID key, KeyModifierMask mask,
+							SInt32 count, KeyButton button);
+
+	// Unit test accessors
+	KeyButton			getLastDown() const { return m_lastDown; }
+	void				setLastDown(KeyButton value) { m_lastDown = value; }
+	KeyModifierMask		getSavedModifiers() const { return m_savedModifiers; }
+	void				setSavedModifiers(KeyModifierMask value) { m_savedModifiers = value; }
+
+protected:
+	// KeyState overrides
+	virtual void		getKeyMap(barrier::KeyMap& keyMap);
+	virtual void		fakeKey(const Keystroke& keystroke);
+	virtual KeyModifierMask&
+						getActiveModifiersRValue();
+
+private:
+	typedef std::vector<HKL> GroupList;
+
+	// send ctrl+alt+del hotkey event on NT family
+	static void			ctrlAltDelThread(void*);
+
+	bool				getGroups(GroupList&) const;
+	void				setWindowGroup(SInt32 group);
+
+	KeyID				getIDForKey(barrier::KeyMap::KeyItem& item,
+							KeyButton button, UINT virtualKey,
+							PBYTE keyState, HKL hkl) const;
+
+	void				addKeyEntry(barrier::KeyMap& keyMap, barrier::KeyMap::KeyItem& item);
+
+	void				init();
+
+private:
+	// not implemented
+	MSWindowsKeyState(const MSWindowsKeyState&);
+	MSWindowsKeyState& operator=(const MSWindowsKeyState&);
+
+private:
+	typedef std::map<HKL, SInt32> GroupMap;
+	typedef std::map<KeyID, UINT> KeyToVKMap;
+
+	void*				m_eventTarget;
+	MSWindowsDesks*	m_desks;
+	HKL					m_keyLayout;
+	UINT				m_buttonToVK[512];
+	UINT				m_buttonToNumpadVK[512];
+	KeyButton			m_virtualKeyToButton[256];
+	KeyToVKMap			m_keyToVKMap;
+	IEventQueue*		m_events;
+
+	// the timer used to check for fixing key state
+	EventQueueTimer*	m_fixTimer;
+
+	// the groups (keyboard layouts)
+	GroupList			m_groups;
+	GroupMap			m_groupMap;
+
+	// the last button that we generated a key down event for.  this
+	// is zero if the last key event was a key up.  we use this to
+	// synthesize key repeats since the low level keyboard hook can't
+	// tell us if an event is a key repeat.
+	KeyButton			m_lastDown;
+
+	// modifier tracking
+	bool				m_useSavedModifiers;
+	KeyModifierMask		m_savedModifiers;
+	KeyModifierMask		m_originalSavedModifiers;
+
+	// pointer to ToUnicodeEx.  on win95 family this will be NULL.
+	typedef int (WINAPI *ToUnicodeEx_t)(UINT wVirtKey,
+										UINT wScanCode,
+										PBYTE lpKeyState,
+										LPWSTR pwszBuff,
+										int cchBuff,
+										UINT wFlags,
+										HKL dwhkl);
+	ToUnicodeEx_t		m_ToUnicodeEx;
+
+	static const KeyID	s_virtualKey[];
+};