摘要：
1.、WM_DEVICECHANGE ：驱动器加载时是发送WM_DEVICECHANGE消息，但是判断驱动器是加载还是卸载就要判断WPARAM字段是DEVICEARRIVE还是DEVICEMOVE。DEVICECHANGE0X219DEVICEARRVIE0X8000DEVICEREMOVE0X8004 WM_NULL = 0x0000, WM_CREATE = 0x0001, WM_DESTROY = 0x0002, WM_MOVE = 0x0003, WM_SIZE = 0x0005, WM_ACTIVATE = 0x0006, WM_SETFOCUS = 0x0007, ... 阅读全文
