键盘VK表

键	Id
VK_LBUTTON	1
VK_RBUTTON	2
VK_CANCEL	3
VK_MBUTTON	4
VK_BACK	8
VK_TAB	9
VK_CLEAR	12
VK_RETURN	13
VK_SHIFT	16
VK_CONTROL	17
VK_MENU	18
VK_PAUSE	19
VK_CAPITAL	20