用qt开发的windows软件，需要用到usb通讯，怎么实现软件和hid设备通讯

[zrw_liming]

当该hid设备通过usb连接到电脑时，软件可以检测到该设备，并且做出相应的响应，我是新手，求教大神们，就该如何下手。。。[

[zrw_liming]

关键我现在有个问题是，我用的qt版本是MinGW的，现在我不知道怎么接入库，我在工程里加外部库， INCLUDEPATH += $$PWD/../../include LIBS += -L$$PWD/../../libs/ -lmsc_x64 在main里加pragma comment(lib,"../../libs/msc_x64.lib") 但就是找不到lib库，路径什么的都试过好多次了，就是不行，望指点

[欧阳春晖]

SUB通讯和qt无关，你可以调用windows API完成 或者网上找libusb之类的跨平台库

[赵4老师]

WM_DEVICECHANGE The WM_DEVICECHANGE device message notifies an application or device driver of a change to the hardware configuration of a device or the computer. Event = (UINT) wParam; dwData = (DWORD) lParam; Parameters Event Event type. This parameter can be one of the following values: Value Meaning DBT_CONFIGCHANGECANCELED A request to change the current configuration (dock or undock) has been canceled. DBT_CONFIGCHANGED The current configuration has changed, due to a dock or undock. DBT_DEVICEARRIVAL A device has been inserted and is now available. DBT_DEVICEQUERYREMOVE Permission is requested to remove a device. Any application can deny this request and cancel the removal. DBT_DEVICEQUERYREMOVEFAILED A request to remove a device has been canceled. DBT_DEVICEREMOVECOMPLETE A device has been removed. DBT_DEVICEREMOVEPENDING A device is about to be removed. Cannot be denied. DBT_DEVICETYPESPECIFIC A device-specific event has occurred. DBT_QUERYCHANGECONFIG Permission is requested to change the current configuration (dock or undock). DBT_USERDEFINED The meaning of this message is user-defined. dwData Address of a structure that contains event-specific data. Its meaning depends on the given event. Return Values Return TRUE to grant a requested action. Return BROADCAST_QUERY_DENY to deny a requested action. Remarks For devices that offer software-controllable features, such as ejection and locking, the system typically sends a DBT_DEVICEREMOVEPENDING message to let applications and device drivers end their use of the device gracefully. If the system forcibly removes a device, it may not send a DBT_DEVICEQUERYREMOVE message before doing so. DBT_CONFIGCHANGECANCELED, DBT_CONFIGCHANGED, DBT_DEVICEARRIVAL, DBT_DEVICEQUERYREMOVE, DBT_DEVICEQUERYREMOVEFAILED, DBT_DEVICEREMOVECOMPLETE, DBT_DEVICEREMOVEPENDING, DBT_DEVICETYPESPECIFIC, DBT_QUERYCHANGECONFIG, DBT_USERDEFINED QuickInfo Windows NT: Requires version 4.0 or later. Windows: Requires Windows 95 or later. Windows CE: Unsupported. Header: Declared in winuser.h. See Also System Messages Overview, System Message Messages