0-255 也就是一个Byte

return {
["~"] = 192,
["`"] = 192,
["1"] = 49,
["2"] = 50,
["3"] = 51,
["4"] = 52,
["5"] = 53,
["6"] = 54,
["7"] = 55,
["8"] = 56,
["9"] = 57,
["0"] = 48,
["-"] = 189,
["+"] = 187,
["q"] = 81,
["w"] = 87,
["e"] = 69,
["r"] = 82,
["t"] = 84,
["y"] = 89,
["u"] = 85,
["i"] = 73,
["o"] = 79,
["p"] = 80,
["("] = 219,
[")"] = 221,
["\\"] = 220,
["a"] = 65,
["s"] = 83,
["d"] = 68,
["f"] = 70,
["g"] = 71,
["h"] = 72,
["j"] = 74,
["k"] = 75,
["l"] = 76,
[""] = 186,
["，"] = 222,
["z"] = 90,
["x"] = 88,
["c"] = 67,
["v"] = 86,
["b"] = 66,
["n"] = 78,
["m"] = 77,
[","] = 188,
["."] = 190,
["/"] = 191,
["esc"] = 27,
["f1"] = 112,
["f2"] = 113,
["f3"] = 114,
["f4"] = 115,
["f5"] = 116,
["f6"] = 117,
["f7"] = 118,
["f8"] = 119,
["f9"] = 120,
["f10"] = 121,
["f11"] = 122,
["f12"] = 123,
["num0"] = 96,
["num1"] = 97,
["num2"] = 98,
["num3"] = 99,
["num4"] = 100,
["num5"] = 101,
["num6"] = 102,
["num7"] = 103,
["num8"] = 104,
["num9"] = 105,
["numdel"] = 110,
["enter"] = 13,
["num+"] = 107,
["num-"] = 109,
["num*"] = 106,
["num/"] = 111,
["pause"] = 144,
["tab"] = 9,
["caplock"] = 20,
["shift"] = 16,
["s+"] = 16,
["leftshift"] = 160,
["rightshift"] = 161,
["ctrl"] = 17,
["c+"] = 17,
["leftctrl"] = 162,
["rightctrl"] = 163,
["alt"] = 18,
["a+"] = 18,
["leftalt"] = 164,
["rightalt"] = 165,
["win"] = 91,
["printscreen"] = 44,
["scrolllock"] = 145,
["home"] = 36,
["end"] = 35,
["delete"] = 46,
["pageup"] = 33,
["pagedown"] = 34,
["left"] = 37,
["up"] = 38,
["right"] = 39,
["down"] = 40,
["spack"] = 32
}

有规律但不完全有规律，因为世界上除了用拼音和英语的用美国键盘，其它语言的键盘都不一样。微软为了兼容把这些键盘按键按照序列一一对应起来了。按键码是由键盘点击生成的扫描码通过键盘驱动生成。跟使用啥语言没丁点关系。

在左侧有自动识别的对应的按键码值，键盘上的都能输入的