This repository has been archived on 2022-08-05. You can view files and clone it, but cannot push or open issues or pull requests.
CC-Functions/W32/Hooks/KeyboardHook.cs

51 lines
1.7 KiB
C#
Raw Normal View History

using CC_Functions.W32.Native;
2019-11-10 12:28:29 +01:00
2019-12-22 16:58:16 +01:00
namespace CC_Functions.W32.Hooks
2019-11-10 12:28:29 +01:00
{
public sealed class KeyboardHook : IDisposable
{
2019-12-22 16:58:16 +01:00
public delegate void KeyPress(KeyboardHookEventArgs args);
2019-11-10 12:28:29 +01:00
private const int WH_KEYBOARD_LL = 13;
private const int WM_KEYDOWN = 0x0100;
2019-11-29 21:27:24 +01:00
2019-12-22 16:58:16 +01:00
private static readonly List<KeyboardHook> Instances = new List<KeyboardHook>();
private static readonly user32.LowLevelProc Proc = HookCallback;
private static IntPtr _hookID = IntPtr.Zero;
2019-11-10 12:28:29 +01:00
public KeyboardHook()
{
2019-12-22 16:58:16 +01:00
if (Instances.Count == 0)
_hookID = SetHook(Proc);
Instances.Add(this);
2019-11-10 12:28:29 +01:00
}
public void Dispose()
{
2019-12-22 16:58:16 +01:00
Instances.Remove(this);
if (Instances.Count == 0)
user32.UnhookWindowsHookEx(_hookID);
}
2020-01-10 16:52:06 +01:00
public event KeyPress? OnKeyPress;
private IntPtr SetHook(user32.LowLevelProc proc)
2019-11-10 12:28:29 +01:00
{
2019-12-22 16:58:16 +01:00
using (Process curProcess = Process.GetCurrentProcess())
using (ProcessModule curModule = curProcess.MainModule)
return user32.SetWindowsHookEx(WH_KEYBOARD_LL, proc, kernel32.GetModuleHandle(curModule.ModuleName), 0);
2019-11-10 12:28:29 +01:00
}
private static IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam)
{
if (nCode >= 0 && wParam == (IntPtr) WM_KEYDOWN)
2019-11-10 12:28:29 +01:00
{
2019-12-22 16:58:16 +01:00
int vkCode = Marshal.ReadInt32(lParam);
for (int i = 0; i < Instances.Count; i++)
Instances[i].OnKeyPress?.Invoke(new KeyboardHookEventArgs((Keys) vkCode));
2019-11-10 12:28:29 +01:00
}
return user32.CallNextHookEx(_hookID, nCode, wParam, lParam);
2019-11-10 12:28:29 +01:00
}
}
2019-11-29 21:27:24 +01:00
}