The key codes module contains a list of constants representing numeric codes for
keys, modifiers and mouse buttons.

These codes are used by key and mouse #events, and by the #{polled input} module.

[ @{Mouse Button} | @{Value}
* Left mouse button | MOUSE_LEFT
* Right mouse button | MOUSE_RIGHT
* Middle mouse button | MOUSE_MIDDLE
]

[ @{Modifier} | @{Value}
* Shift modifier | MODIFIER_SHIFT
* Control modifier | MODIFIER_CONTROL
* Option modifier | MODIFIER_OPTION
* System modifier | MODIFIER_SYSTEM
* Command modifier | MODIFIER_COMMAND
]

[ @{Key} | @{Value}
* Backspace | KEY_BACKSPACE
* Tab | KEY_TAB
* Clear | KEY_CLEAR
* Return | KEY_RETURN
* Enter | KEY_ENTER
* Pause | KEY_PAUSE
* Escape | KEY_ESCAPE
* Space | KEY_SPACE
* Page Up | KEY_PAGEUP
* Page Down | KEY_PAGEDOWN
* End | KEY_END
* Home | KEY_HOME
* Cursor (Left) | KEY_LEFT
* Cursor (Up) | KEY_UP
* Cursor (Right) | KEY_RIGHT
* Cursor (Down) | KEY_DOWN
* Select | KEY_SELECT
* Print | KEY_PRINT
* Execute | KEY_EXECUTE
* Screen | KEY_SCREEN
* Insert | KEY_INSERT
* Delete | KEY_DELETE
* Help | KEY_HELP
* 0 | KEY_0
* 1 | KEY_1
* 2 | KEY_2
* 3 | KEY_3
* 4 | KEY_4
* 5 | KEY_5
* 6 | KEY_6
* 7 | KEY_7
* 8 | KEY_8
* 9 | KEY_9
* A | KEY_A
* B | KEY_B
* C | KEY_C
* D | KEY_D
* E | KEY_E
* F | KEY_F
* G | KEY_G
* H | KEY_H
* I | KEY_I
* J | KEY_J
* K | KEY_K
* L | KEY_L
* M | KEY_M
* N | KEY_N
* O | KEY_O
* P | KEY_P
* Q | KEY_Q
* R | KEY_R
* S | KEY_S
* T | KEY_T
* U | KEY_U
* V | KEY_V
* W | KEY_W
* X | KEY_X
* Y | KEY_Y
* Z | KEY_Z
* Sys key (Left) | KEY_LSYS
* Sys key (Right) | KEY_RSYS
* Numpad 0 | KEY_NUM0
* Numpad 1 | KEY_NUM1
* Numpad 2 | KEY_NUM2
* Numpad 3 | KEY_NUM3
* Numpad 4 | KEY_NUM4
* Numpad 5 | KEY_NUM5
* Numpad 6 | KEY_NUM6
* Numpad 7 | KEY_NUM7
* Numpad 8 | KEY_NUM8
* Numpad 9 | KEY_NUM9
* Numpad * | KEY_NUMMULTIPLY
* Numpad + | KEY_NUMADD
* Numpad - | KEY_NUMSUBTRACT
* Numpad . | KEY_NUMDECIMAL
* Numpad / | KEY_NUMDIVIDE
* F1 | KEY_F1
* F2 | KEY_F2
* F3 | KEY_F3
* F4 | KEY_F4
* F5 | KEY_F5
* F6 | KEY_F6
* F7 | KEY_F7
* F8 | KEY_F8
* F9 | KEY_F9
* F10 | KEY_F10
* F11 | KEY_F11
* F12 | KEY_F12
* Num Lock | KEY_NUMLOCK
* Scroll Lock | KEY_SCROLL
* Shift (Left) | KEY_LSHIFT
* Shift (Right) | KEY_RSHIFT
* Control (Left) | KEY_LCONTROL
* Control (Right) | KEY_RCONTROL
* Alt key (Left) | KEY_LALT
* Alt key (Right) | KEY_RALT
* Tilde | KEY_TILDE
* Minus | KEY_MINUS
* Equals | KEY_EQUALS
* Bracket (Open) | KEY_OPENBRACKET
* Bracket (Close) | KEY_CLOSEBRACKET
* Backslash | KEY_BACKSLASH
* Semi-colon | KEY_SEMICOLON
* Quote | KEY_QUOTES
* Comma | KEY_COMMA
* Period | KEY_PERIOD
* Slash | KEY_SLASH
]