USB到micro USB adpater在设备更换中无法识别 [英] USB to micro USB adpater not getting recognized in ondevicechange

问题描述

HI，

当插入/拔出USB到micro USB adpater时 我的windows系统，ondevicechange（） 正在调用，但我得到PDEV_BROADCAST_HDR为null，事件类型值为7.

When plug in/out USB to micro USB adpater in  my windows system, ondevicechange()  is getting called but I am getting PDEV_BROADCAST_HDR as null and event type value as 7.

DBT_DEVICEARRIVAL和  USB到micro USB adpater没有触发DBT_DEVICEREMOVECOMPLETE事件。

The DBT_DEVICEARRIVAL and  DBT_DEVICEREMOVECOMPLETE events are not getting triggered for USB to micro USB adpater.

可能的原因是什么？

我是否必须调用RegisterDeviceNotification（） ？如果是这种情况我必须设置什么GUID？

Whether I have to call RegisterDeviceNotification()? If that is the case what GUID I have to set?

推荐答案

你好，

也许这篇文章可以帮到你：

maybe this article can help you:

https://www.codeproject.com/Articles/14500/Detecting-Hardware-Insertion-and-or-Removal

或者可能是适配器没有芯片可以解释PC是哪种设备。如果它只是一根电缆，我想，没有检测到真正的设备。

Or maybe the adapter does not have a chip that explains the PC which device it is. If it's only a cable, I think, no real device is detected.

问候，Guido

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