C# Definition:

    [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
    public struct USB_PORT_CONNECTOR_PROPERTIES
    {
        public uint ConnectionIndex;
        public uint ActualLength;
        public uint Properties;  
        public ushort CompanionIndex;
        public ushort CompanionPortNumber;
        [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 255)]
        public string CompanionHubSymbolicLinkName;
    }

VB Definition:

Structure USB_PORT_CONNECTOR_PROPERTIES
   Public TODO
End Structure

User-Defined Field Types:

None.

Notes:

The Properties field is a USB_PORT_PROPERTIES, which is a packed ULONG (32-bit int), as shown below.

  struct {
    ULONG PortIsUserConnectable : 1;
    ULONG PortIsDebugCapable : 1;
    ULONG PortHasMultipleCompanions : 1;
    ULONG PortConnectorIsTypeC : 1;
    ULONG ReservedMBZ : 28;
  };

USB_PORT_CONNECTOR_PROPERTIES is obtained from an control request using DeviceIOControl.

The control code is:

    public const uint IOCTL_USB_GET_PORT_CONNECTOR_PROPERTIES = 0x00220458;