SetupDiGetDeviceInterfaceDetail仅为所有USB HID对象的path返回“\”

我可以告诉我有多less个USB HID设备（7），但是每次尝试获取任何设备上的详细信息时，返回的path始终为“\”，使得我根本无法访问设备。 我使用的代码在过程中与此代码非常相似：

HANDLE connectDeviceNumber(DWORD deviceIndex) { GUID hidGUID; HDEVINFO hardwareDeviceInfoSet; SP_DEVICE_INTERFACE_DATA deviceInterfaceData; PSP_INTERFACE_DEVICE_DETAIL_DATA deviceDetail; ULONG requiredSize; HANDLE deviceHandle = INVALID_HANDLE_VALUE; DWORD result; //Get the HID GUID value - used as mask to get list of devices HidD_GetHidGuid (&hidGUID); //Get a list of devices matching the criteria (hid interface, present) hardwareDeviceInfoSet = SetupDiGetClassDevs (&hidGUID, NULL, // Define no enumerator (global) NULL, // Define no (DIGCF_PRESENT | // Only Devices present DIGCF_DEVICEINTERFACE)); // Function class devices. deviceInterfaceData.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA); //Go through the list and get the interface data result = SetupDiEnumDeviceInterfaces (hardwareDeviceInfoSet, NULL, //infoData, &hidGUID, //interfaceClassGuid, deviceIndex, &deviceInterfaceData); /* Failed to get a device - possibly the index is larger than the number of devices */ if (result == FALSE) { SetupDiDestroyDeviceInfoList (hardwareDeviceInfoSet); Log("hidin: -- failed to get specified device number"); return INVALID_HANDLE_VALUE; } //Get the details with null values to get the required size of the buffer SetupDiGetDeviceInterfaceDetail (hardwareDeviceInfoSet, &deviceInterfaceData, NULL, //interfaceDetail, 0, //interfaceDetailSize, &requiredSize, 0); //infoData)) //Allocate the buffer deviceDetail = (PSP_INTERFACE_DEVICE_DETAIL_DATA)malloc(requiredSize); deviceDetail->cbSize = sizeof(SP_INTERFACE_DEVICE_DETAIL_DATA); //Fill the buffer with the device details if (!SetupDiGetDeviceInterfaceDetail (hardwareDeviceInfoSet, &deviceInterfaceData, deviceDetail, requiredSize, &requiredSize, NULL)) { SetupDiDestroyDeviceInfoList (hardwareDeviceInfoSet); free (deviceDetail); Log("hidin: -- failed to get device info"); return INVALID_HANDLE_VALUE; } Log("Opening device with path: %s", deviceDetail->DevicePath); 

  Log("Opening device with path: %ls", deviceDetail->DevicePath);