Getting USB device handle in C#

Question

I'm trying to create an addon for KSP that would allow the usage of the MFD functions of the X52 Pro joystick within the game.

I've ran into an issue though, where I have no idea how to the the device handle for the joystick.

Does anyone know how I would get the device handle?

Answer 1

You could subclass WinProc on your Window C# Winforms class , since message.LParam and message.RParam are HID handles with semantic type HWND analogous to MFC.

using System; using System.Collections.Generic; using System.Linq; using System.Windows.Forms; using System.Runtime.InteropServices; using Microsoft.Win32;

namespace WindowsFormsApplicationJoyStick { public class Program : RichTextBox {

    /// <summary>
    /// Function to retrieve raw input data.
    /// </summary>
    /// <param name="hRawInput">Handle to the raw input.</param>
    /// <param name="uiCommand">Command to issue when retrieving data.</param>
    /// <param name="pData">Raw input data.</param>
    /// <param name="pcbSize">Number of bytes in the array.</param>
    /// <param name="cbSizeHeader">Size of the header.</param>
    /// <returns>0 if successful if pData is null, otherwise number of bytes if pData is not null.</returns>

    [DllImport("User32.dll")]
    extern static uint GetRawInputData(IntPtr hRawInput, uint uiCommand, IntPtr pData, ref uint pcbSize, uint cbSizeHeader);


    protected override void WndProc(ref Message m)
    {
        if (m.Msg == (int)WindowMessages.RawInput)  // WindowMessages.RawInput = 0x00FF (WM_INPUT)
        {
            RAWINPUT input = new RAWINPUT();
            int outSize = 0;
            int size = Marshal.SizeOf(typeof(RAWINPUT));

            outSize = Win32API.GetRawInputData(m.LParam, RawInputCommand.Input, out input, ref size, Marshal.SizeOf(typeof(RAWINPUTHEADER)));
            if (outSize != -1)
            {
                if (input.Header.Type == RawInputType.Joystick)
                {
                          // Output X and Y coordinates of Joystick movements                  
               }
        }
        base.WndProc(ref m);
    }

}

}