public unsafe static bool IsEnable(SetupAPI.SP_DEVINFO_DATA DevData)
        {
            int Status  = 0;
            int Problem = 0;

            SetupAPI.CM_Get_DevNode_Status(ref Status, ref Problem, DevData.DevInst, 0);
            return(!(((Status & SetupAPI.DN_HAS_PROBLEM) != 0) && (Problem == SetupAPI.CM_PROB_DISABLED)));
        }
        public unsafe static bool IsDisableable(SetupAPI.SP_DEVINFO_DATA DevData)
        {
            int Status  = 0;
            int Problem = 0;

            SetupAPI.CM_Get_DevNode_Status(ref Status, ref Problem, DevData.DevInst, 0);
            return(((Status & SetupAPI.DN_DISABLEABLE) != 0) && (Problem != SetupAPI.CM_PROB_HARDWARE_DISABLED));
        }
        public unsafe static string GetRegistryProperty(int PnPHandle, ref SetupAPI.SP_DEVINFO_DATA DeviceInfoData, SetupAPI.RegPropertyType Property)
        {
            int RequiredSize = 0;

            SetupAPI.DATA_BUFFER Buffer = new SetupAPI.DATA_BUFFER();

            int result = SetupAPI.SetupDiGetDeviceRegistryProperty(
                PnPHandle,
                ref DeviceInfoData,
                Property,
                null,
                ref Buffer,
                1024,
                ref RequiredSize
                );

            return(Buffer.Buffer);
        }
        static unsafe void Main(string[] args)
        {
            Guid UsbGuid = new Guid("{36FC9E60-C465-11CF-8056-444553540000}");

            int PnPHandle = SetupAPI.SetupDiGetClassDevs(
                ref UsbGuid,
                null,
                null,
                SetupAPI.ClassDevsFlags.DIGCF_PRESENT
                );

            int result      = -1;
            int DeviceIndex = 0;

            while (result != 0)
            {
                SetupAPI.SP_DEVINFO_DATA DeviceInfoData = new SetupAPI.SP_DEVINFO_DATA();
                DeviceInfoData.cbSize = Marshal.SizeOf(DeviceInfoData);
                result = SetupAPI.SetupDiEnumDeviceInfo(PnPHandle, DeviceIndex, ref DeviceInfoData);

                if (result == 1)
                {
                    Console.WriteLine("{0}:\n\tIsEnabled={1}\n\tIsDisableable={2}",
                                      GetRegistryProperty(PnPHandle, ref DeviceInfoData, SetupAPI.RegPropertyType.SPDRP_DEVICEDESC),
                                      IsEnable(DeviceInfoData),
                                      IsDisableable(DeviceInfoData)
                                      );
                }

                DeviceIndex++;
            }

            Marshal.FreeHGlobal((System.IntPtr)PnPHandle);

            Console.ReadLine();
        }