using System;

 using System.Windows.Forms;

 using System.Runtime.InteropServices;

 using System.Diagnostics;

 using System.Text;

 using Microsoft.Win32.SafeHandles;

 namespace Hid

 {

     /// <summary>

     /// Represent a HID device.

     /// </summary>

     class HidDevice

     {

         public string Name { get; private set; }

         public string Manufacturer { get; private set; }

         public string Product { get; private set; }

         public ushort VendorId { get; private set; }

         public ushort ProductId { get; private set; }

         public ushort Version { get; private set; }

         /// <summary>

         /// Class constructor will fetch this object properties from HID sub system.

         /// </summary>

         /// <param name="hRawInputDevice">Device Handle as provided by RAWINPUTHEADER.hDevice, typically accessed as rawinput.header.hDevice</param>

         public HidDevice(IntPtr hRawInputDevice)

         {

             //Fetch various information defining the given HID device

             Name = Win32.RawInput.GetDeviceName(hRawInputDevice);            

             //Open our device from the device name/path

             SafeFileHandle handle=Win32.Function.CreateFile(Name,

                 Win32.FileAccess.NONE,

                 Win32.FileShare.FILE_SHARE_READ|Win32.FileShare.FILE_SHARE_WRITE,

                 IntPtr.Zero,

                 Win32.CreationDisposition.OPEN_EXISTING,

                 Win32.FileFlagsAttributes.FILE_FLAG_OVERLAPPED,

                 IntPtr.Zero

                 );

             if (handle.IsInvalid)

             {

                 Debug.WriteLine("Failed to CreateFile from device name " + Marshal.GetLastWin32Error().ToString());

             }

             else

             {

                 //Get manufacturer string

                 StringBuilder manufacturerString = new StringBuilder(256);

                 if (Win32.Function.HidD_GetManufacturerString(handle, manufacturerString, manufacturerString.Capacity))

                 {

                     Manufacturer = manufacturerString.ToString();                    

                 }

                 //Get product string

                 StringBuilder productString = new StringBuilder(256);

                 if (Win32.Function.HidD_GetProductString(handle, productString, productString.Capacity))

                 {

                     Product = productString.ToString();                    

                 }

                 //Get attributes

                 Win32.HIDD_ATTRIBUTES attributes=new Win32.HIDD_ATTRIBUTES();

                 if (Win32.Function.HidD_GetAttributes(handle, ref attributes))

                 {

                     VendorId = attributes.VendorID;

                     ProductId = attributes.ProductID;

                     Version = attributes.VersionNumber;

                 }

                 handle.Close();

             }

         }

         /// <summary>

         /// Print information about this device to our debug output.

         /// </summary>

         public void DebugWrite()

         {

             Debug.WriteLine("================ HID =========================================================================================");

             Debug.WriteLine("==== Name: " + Name);

             Debug.WriteLine("==== Manufacturer: " + Manufacturer);

             Debug.WriteLine("==== Product: " + Product);

             Debug.WriteLine("==== VendorID: 0x" + VendorId.ToString("X4"));

             Debug.WriteLine("==== ProductID: 0x" + ProductId.ToString("X4"));

             Debug.WriteLine("==== Version: " + Version.ToString());

             Debug.WriteLine("==============================================================================================================");

         }

     }

 }