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diff --git a/hammer/keyboard.h b/hammer/keyboard.h
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+++ b/hammer/keyboard.h
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+//========= Copyright Valve Corporation, All rights reserved. ============//
+//
+// Purpose: 
+//
+// $NoKeywords: $
+//=============================================================================//
+
+#ifndef KEYBOARD_H
+#define KEYBOARD_H
+#ifdef _WIN32
+#pragma once
+#endif
+
+
+#define KEY_MOD_SHIFT				0x0001
+#define KEY_MOD_CONTROL				0x0002
+#define KEY_MOD_ALT					0x0004
+
+
+//
+// Defines the maximum number of physical keys. These physical keys correspond to
+// the windows virtual key codes shown below. Missing key codes may be up for grabs,
+// but it is probably safer to add to the end of the list.
+//
+#define MAX_PHYSICAL_KEYS			256
+
+//
+// VK_LBUTTON        0x01
+// VK_RBUTTON        0x02
+// VK_CANCEL         0x03
+// VK_MBUTTON        0x04
+// ?				 0x04
+// ?				 0x05
+// ?				 0x06
+// ?				 0x07
+// VK_BACK           0x08
+// VK_TAB            0x09
+// ?				 0x0A
+// ?				 0x0B
+// VK_CLEAR          0x0C
+// VK_RETURN         0x0D
+// ?				 0x0E
+// ?				 0x0F
+// VK_SHIFT          0x10
+// VK_CONTROL        0x11
+// VK_MENU           0x12
+// VK_PAUSE          0x13
+// VK_CAPITAL        0x14
+// VK_KANA           0x15
+// VK_HANGUL         0x15
+// VK_JUNJA          0x17
+// VK_FINAL          0x18
+// VK_KANJI          0x19
+// ?				 0x1A
+// VK_ESCAPE         0x1B
+// VK_CONVERT        0x1C
+// VK_NONCONVERT     0x1D
+// VK_ACCEPT         0x1E
+// VK_MODECHANGE     0x1F
+// VK_SPACE          0x20
+// VK_PRIOR          0x21
+// VK_NEXT           0x22
+// VK_END            0x23
+// VK_HOME           0x24
+// VK_LEFT           0x25
+// VK_UP             0x26
+// VK_RIGHT          0x27
+// VK_DOWN           0x28
+// VK_SELECT         0x29
+// VK_PRINT          0x2A
+// VK_EXECUTE        0x2B
+// VK_SNAPSHOT       0x2C
+// VK_INSERT         0x2D
+// VK_DELETE         0x2E
+// VK_HELP           0x2F
+//
+// VK_0 thru VK_9 are the same as ASCII '0' thru '9' (0x30 - 0x39)
+//
+// VK_0			0x30
+// VK_1			0x31
+// VK_2			0x32
+// VK_3			0x33
+// VK_4			0x34
+// VK_5			0x35
+// VK_6			0x36
+// VK_7			0x37
+// VK_8			0x38
+// VK_9			0x39
+// ?			0x40
+//
+// VK_A thru VK_Z are the same as ASCII 'A' thru 'Z' (0x41 - 0x5A)
+//
+// VK_A			0X41
+// VK_B			0X42
+// VK_C			0X43
+// VK_D			0X44
+// VK_E			0X45
+// VK_F			0X46
+// VK_G			0X47
+// VK_H			0X48
+// VK_I			0X49
+// VK_J			0X4A
+// VK_K			0X4B
+// VK_L			0X4C
+// VK_M			0X4D
+// VK_N			0X4E
+// VK_O			0X4F
+// VK_P			0X50
+// VK_Q			0X51
+// VK_R			0X52
+// VK_S			0X53
+// VK_T			0X54
+// VK_U			0X55
+// VK_V			0X56
+// VK_W			0X57
+// VK_X			0X58
+// VK_Y			0X59
+// VK_Z			0X5A
+// VK_LWIN      0x5B
+// VK_RWIN      0x5C
+// VK_APPS      0x5D
+// ?			0x5E
+// ?			0x5F
+// VK_NUMPAD0   0x60
+// VK_NUMPAD1   0x61
+// VK_NUMPAD2   0x62
+// VK_NUMPAD3   0x63
+// VK_NUMPAD4   0x64
+// VK_NUMPAD5   0x65
+// VK_NUMPAD6   0x66
+// VK_NUMPAD7   0x67
+// VK_NUMPAD8   0x68
+// VK_NUMPAD9   0x69
+// VK_MULTIPLY  0x6A
+// VK_ADD       0x6B
+// VK_SEPARATOR 0x6C
+// VK_SUBTRACT  0x6D
+// VK_DECIMAL   0x6E
+// VK_DIVIDE    0x6F
+//
+// Function keys
+//
+// VK_F1        0x70
+// VK_F2        0x71
+// VK_F3        0x72
+// VK_F4        0x73
+// VK_F5        0x74
+// VK_F6        0x75
+// VK_F7        0x76
+// VK_F8        0x77
+// VK_F9        0x78
+// VK_F10       0x79
+// VK_F11       0x7A
+// VK_F12       0x7B
+// VK_F13       0x7C
+// VK_F14       0x7D
+// VK_F15       0x7E
+// VK_F16       0x7F
+// VK_F17       0x80
+// VK_F18       0x81
+// VK_F19       0x82
+// VK_F20       0x83
+// VK_F21       0x84
+// VK_F22       0x85
+// VK_F23       0x86
+// VK_F24       0x87
+// ?			0x88
+// ?			0x89
+// ?			0x8A
+// ?			0x8B
+// ?			0x8C
+// ?			0x8D
+// ?			0x8E
+// ?			0x8F
+// VK_NUMLOCK   0x90
+// VK_SCROLL    0x91
+// ?			0x92
+// ?			0x93
+// ?			0x94
+// ?			0x95
+// ?			0x96
+// ?			0x97
+// ?			0x98
+// ?			0x99
+// ?			0x9A
+// ?			0x9B
+// ?			0x9C
+// ?			0x9D
+// ?			0x9E
+// ?			0x9F
+//
+// VK_L* & VK_R* - left and right Alt, Ctrl and Shift virtual keys.
+// Used only as parameters to GetAsyncKeyState() and GetKeyState().
+// No other API or message will distinguish left and right keys in this way.
+//
+// VK_LSHIFT    0xA0
+// VK_RSHIFT    0xA1
+// VK_LCONTROL  0xA2
+// VK_RCONTROL  0xA3
+// VK_LMENU     0xA4
+// VK_RMENU     0xA5
+// VK_PROCESSKEY 0xE5
+// VK_ATTN      0xF6
+// VK_CRSEL     0xF7
+// VK_EXSEL     0xF8
+// VK_EREOF     0xF9
+// VK_PLAY      0xFA
+// VK_ZOOM      0xFB
+// VK_NONAME    0xFC
+// VK_PA1       0xFD
+// VK_OEM_CLEAR 0xFE
+//
+
+
+//
+// Defines the maximum number of logical keys. Logical keys are application-specific
+// values that are associated with physical keys via AddKeyMap.
+//
+#define MAX_LOGICAL_KEYS			256
+
+
+//
+// Defines the maximum number of unique key bindings.
+//
+#define MAX_KEYMAPS					256
+
+
+typedef struct
+{
+	unsigned int uChar;
+	unsigned int uModifierKeys;
+	unsigned int uLogicalKey;
+} KeyMap_t;
+
+
+class CKeyboard
+{
+	public:
+			
+		CKeyboard(void);
+		~CKeyboard(void);
+
+		void AddKeyMap(unsigned int uChar, unsigned int uModifierKeys, unsigned int uLogicalKey);
+		void ClearImpulseFlags(void);
+		void ClearKeyStates(void);
+		float GetKeyScale(unsigned int uLogicalKey);
+
+		void OnKeyDown(UINT nChar, UINT nRepCnt, UINT nFlags);
+		void OnKeyUp(UINT nChar, UINT nRepCnt, UINT nFlags);
+
+		void RemoveAllKeyMaps(void);
+
+	protected:
+
+		bool IsKeyPressed(unsigned int uChar, unsigned int uModifierKeys);
+		bool IsModifierKey(unsigned int uChar);
+
+		unsigned int GetModifierKeyBit(unsigned int uChar);
+
+		void UpdateLogicalKeys(unsigned int uChar, bool bPressed);
+
+		unsigned int g_uPhysicalKeyState[MAX_PHYSICAL_KEYS];
+		unsigned int g_uLogicalKeyState[MAX_LOGICAL_KEYS];
+
+		KeyMap_t g_uKeyMap[MAX_KEYMAPS];
+		unsigned int g_uKeyMaps;
+};
+
+
+#endif // KEYBOARD_H