快捷键 Msg消息

https://baike.baidu.com/item/MSG/16826909?fr=aladdin

https://docs.microsoft.com/en-us/windows/desktop/api/winuser/ns-winuser-tagmsg

https://blog.csdn.net/wh_2396/article/details/52356507 ： 案例

1）WM_KEYFIRST <= pMsg->message&&pMsg->message <= WM_KEYLAST

字符消息过滤