const
  ESCAPE = 27;
  F1 = 59;
  F2 = 60;
  F3 = 61;
  F4 = 62;
  F5 = 63;
  F6 = 64;
  F7 = 65;
  F8 = 66;
  F9 = 67;
  F10 = 68;
  SHIFT_F1 = 84;
  SHIFT_F2 = 85;
  SHIFT_F3 = 86;
  SHIFT_F4 = 87;
  SHIFT_F5 = 88;
  SHIFT_F6 = 89;
  SHIFT_F7 = 90;
  SHIFT_F8 = 91;
  SHIFT_F9 = 92;
  SHIFT_F10 = 93;
  CTRL_F1 = 94;
  CTRL_F2 = 95;
  CTRL_F3 = 96;
  CTRL_F4 = 97;
  CTRL_F5 = 98;
  CTRL_F6 = 99;
  CTRL_F7 = 100;
  CTRL_F8 = 101;
  CTRL_F9 = 102;
  CTRL_F10 = 103;
  ALT_F1 = 104;
  ALT_F2 = 105;
  ALT_F3 = 106;
  ALT_F4 = 107;
  ALT_F5 = 108;
  ALT_F6 = 109;
  ALT_F7 = 110;
  ALT_F8 = 111;
  ALT_F9 = 112;
  ALT_F10 = 113;
  ALT_Q = 16;
  ALT_W = 17;
  ALT_E = 18;
  ALT_R = 19;
  ALT_T = 20;
  ALT_Y = 21;
  ALT_U = 22;
  ALT_I = 23;
  ALT_O = 24;
  ALT_P = 25;
  ALT_A = 30;
  ALT_S = 31;
  ALT_D = 32;
  ALT_F = 33;
  ALT_G = 34;
  ALT_H = 35;
  ALT_J = 36;
  ALT_K = 37;
  ALT_L = 38;
  ALT_Z = 44;
  ALT_X = 45;
  ALT_C = 46;
  ALT_V = 47;
  ALT_B = 48;
  ALT_N = 49;
  ALT_M = 50;
  CTRL_PRTSC = 114;
  ALT_1 = 120;
  ALT_2 = 121;
  ALT_3 = 122;
  ALT_4 = 123;
  ALT_5 = 124;
  ALT_6 = 125;
  ALT_7 = 126;
  ALT_8 = 127;
  ALT_9 = 128;
  ALT_0 = 129;
  ALT_MINUS = 130;
  ALT_EQUAL = 131;
  ARROW_HOME = 71;
  ARROW_UP = 72;
  ARROW_PGUP = 73;
  ARROW_LEFT = 75;
  ARROW_RIGHT = 77;
  ARROW_END = 79;
  ARROW_DOWN = 80;
  ARROW_PGDN = 81;
  CTRL_HOME = 119;
  CTRL_END = 117;