语法：Press Key locator 按键编码
press key关键字后面的键位对应ascii码实际为16进制格式
NULL = 'ue000'
CANCEL = 'ue001' # ^break
HELP = 'ue002'
BACKSPACE = 'ue003'
BACK_SPACE = BACKSPACE
TAB = 'ue004'
CLEAR = 'ue005'
RETURN = 'ue006'
ENTER = 'ue007'
SHIFT = 'ue008'
LEFT_SHIFT = SHIFT
CONTROL = 'ue009'
LEFT_CONTROL = CONTROL
ALT = 'ue00a'
LEFT_ALT = ALT
PAUSE = 'ue00b'
ESCAPE = 'ue00c'
SPACE = 'ue00d'
PAGE_UP = 'ue00e'
PAGE_DOWN = 'ue00f'
END = 'ue010'
HOME = 'ue011'
LEFT = 'ue012'
ARROW_LEFT = LEFT
UP = 'ue013'
ARROW_UP = UP
RIGHT = 'ue014'
ARROW_RIGHT = RIGHT
DOWN = 'ue015'
ARROW_DOWN = DOWN
INSERT = 'ue016'
DELETE = 'ue017'
SEMICOLON = 'ue018'
EQUALS = 'ue019'
NUMPAD0 = 'ue01a' # number pad keys
NUMPAD1 = 'ue01b'
NUMPAD2 = 'ue01c'
NUMPAD3 = 'ue01d'
NUMPAD4 = 'ue01e'
NUMPAD5 = 'ue01f'
NUMPAD6 = 'ue020'
NUMPAD7 = 'ue021'
NUMPAD8 = 'ue022'
NUMPAD9 = 'ue023'
MULTIPLY = 'ue024'
ADD = 'ue025'
SEPARATOR = 'ue026'
SUBTRACT = 'ue027'
DECIMAL = 'ue028'
DIVIDE = 'ue029'
F1 = 'ue031' # function keys
F2 = 'ue032'
F3 = 'ue033'
F4 = 'ue034'
F5 = 'ue035'
F6 = 'ue036'
F7 = 'ue037'
F8 = 'ue038'
F9 = 'ue039'
F10 = 'ue03a'
F11 = 'ue03b'
F12 = 'ue03c'
META = 'ue03d'
COMMAND = 'ue03d'