// Enumerate through all devices in Set.
printf("GUID={%X-%X-%X-%X%X-%X%X%X%X%X%X}\n",ab->Data1,ab->Data2,ab->Data3,ab->Data4[0],ab->Data4[1],ab->Data4[2],ab->Data4[3],ab->Data4[4],ab->Data4[5],ab->Data4[6],ab->Data4[7]);
DeviceInfoData.cbSize = sizeof(SP_DEVINFO_DATA);
for (i = 0;SetupDiEnumDeviceInfo(hDevInfo, i, &DeviceInfoData); i++)//枚举这类设备中所有的设备
{