c# - 从 USB PC Remote 读取输入

Question

我的电脑有一个 Remote ，它通过 USB 连接。它不需要驱动程序，但不支持某些多媒体键。我想知道是否有一种方法可以读取输入数据以便我自己处理事件？

编辑:我找到了一个名为 USBlyzer 的软件，它可以显示我需要的所有信息，并且能够处理 usb 事件。问题是它是闭源的

编辑:这是同一个问题:https://superuser.com/questions/179457/software-to-customise-this-usb-pc-remote-control但仍然没有回答我。我有这个 Remote

Answer 1

我认为 RawInput 是您所需要的。调用 RegisterRawInputDevices(使用平台调用)订阅事件。然后覆盖主窗口的WndProc。并调用GetRawInputData 读取和解析原始数据。

例子:

using System;
using System.Windows.Forms;
using System.Runtime.InteropServices;

namespace StackOverflow
{
    static class Program
    {
        static void Main()
        {
            Application.Run(new Form1());
        }
    }

    public static class KeyboardRawInput
    {
        public struct RawKeyboard
        {
            public int Type;
            public int Size;
            public IntPtr Device;
            public IntPtr WParam;

            public ushort MakeCode;
            public ushort Flags;
            public ushort Reserved;
            public ushort VKey;
            public uint Message;
            public uint ExtraInformation;

        }

        public struct RawInputDevice
        {
            public ushort Page;
            public ushort Usage;
            public int Flags;
            public IntPtr HWnd;
        }


        [DllImport("user32", SetLastError = true)]
        public static extern bool RegisterRawInputDevices(
            [MarshalAs(UnmanagedType.LPArray)] RawInputDevice[] devs,
            uint count,
            int structSize);

        [DllImport("user32")]
        public static extern uint GetRawInputData(
            IntPtr hrawInput,
            uint command,
            ref RawKeyboard data,
            ref uint size,
            int headerSize);
    }

    class Form1 : Form
    {
        protected override void OnLoad(EventArgs e)
        {
            try {
                KeyboardRawInput.RawInputDevice dev = new KeyboardRawInput.RawInputDevice();
                dev.Page = 1;
                dev.Usage = 6;
                dev.Flags = 0x00000100 /*RIDEV_INPUTSINK*/;
                dev.HWnd = this.Handle;

                bool result = KeyboardRawInput.RegisterRawInputDevices(new KeyboardRawInput.RawInputDevice[] { dev }, 1, Marshal.SizeOf(typeof(KeyboardRawInput.RawInputDevice)));
                if (!result)
                    throw new Exception(string.Format("LastError: 0x{0:x}", Marshal.GetLastWin32Error()));

            } catch (Exception ex) {
                MessageBox.Show(ex.Message, "Error registering RawInput");
            }

            base.OnLoad(e);
        }

        protected override void WndProc(ref Message m)
        {
            if (m.Msg == 0xFF) {
                KeyboardRawInput.RawKeyboard keyboard = new KeyboardRawInput.RawKeyboard();
                uint size = (uint)Marshal.SizeOf(keyboard);
                uint result = KeyboardRawInput.GetRawInputData(m.LParam, 0x10000003, ref keyboard, ref size, 4 + 4 + IntPtr.Size * 2);
                if (result != uint.MaxValue) {
                    string parse = string.Format("MakeCode: 0x{0:X}\r\nMessage: 0x{1:X}\r\nVKey: 0x{2:X}", keyboard.MakeCode, keyboard.Message, keyboard.VKey);
                    MessageBox.Show(parse);
                }
            }

            base.WndProc(ref m);
        }
    }
}