Я думаю, что RawInput - это то, что вам нужно. Звоните RegisterRawInputDevices (используя платформу вызова), чтобы подписаться на события. Затем переопределите WndProc главного окна. И позвоните GetRawInputData, чтобы прочитать и проанализировать необработанные данные.
Пример:
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);
}
}
}