SP_DEVICE_INTERFACE_DETAIL_DATA didd = new SP_DEVICE_INTERFACE_DETAIL_DATA();

       SP_DEVICE_INTERFACE_DETAIL_DATA didd = new SP_DEVICE_INTERFACE_DETAIL_DATA();

       SP_DEVICE_INTERFACE_DETAIL_DATA didd = new SP_DEVICE_INTERFACE_DETAIL_DATA();

   ref SP_DEVICE_INTERFACE_DETAIL_DATA deviceInterfaceDetailData,

    ByRef deviceInterfaceDetailData As SP_DEVICE_INTERFACE_DETAIL_DATA, _

    ByRef DeviceInterfaceDetailData As SP_DEVICE_INTERFACE_DETAIL_DATA, _

SP_DEVICE_INTERFACE_DETAIL_DATA

SP_DEVICE_INTERFACE_DETAIL_DATA

SP_DEVICE_INTERFACE_DETAIL_DATA

SP_DEVICE_INTERFACE_DETAIL_DATA needs a ByVal TCHAR[ANYSIZE_ARRAY] member, which could conceivably be any size. This does not bode well for determining the correct size, however DevicePath should be no longer than MAX_PATH (256).

       SP_DEVICE_INTERFACE_DETAIL_DATA didd = new SP_DEVICE_INTERFACE_DETAIL_DATA();

       Dim didd As SP_DEVICE_INTERFACE_DETAIL_DATA = Nothing

       SP_DEVICE_INTERFACE_DETAIL_DATA didd = new SP_DEVICE_INTERFACE_DETAIL_DATA();

  struct SP_DEVICE_INTERFACE_DETAIL_DATA

Public Structure SP_DEVICE_INTERFACE_DETAIL_DATA

SP_DEVICE_INTERFACE_DETAIL_DATA didd = new SP_DEVICE_INTERFACE_DETAIL_DATA();

didd.cbSize = Marshal.SizeOf(typeof(SP_DEVICE_INTERFACE_DETAIL_DATA))