51 lines
1.7 KiB
C#
51 lines
1.7 KiB
C#
using CC_Functions.W32.Native;
|
|
|
|
namespace CC_Functions.W32.Hooks
|
|
{
|
|
public sealed class KeyboardHook : IDisposable
|
|
{
|
|
public delegate void KeyPress(KeyboardHookEventArgs args);
|
|
|
|
private const int WH_KEYBOARD_LL = 13;
|
|
private const int WM_KEYDOWN = 0x0100;
|
|
|
|
private static readonly List<KeyboardHook> Instances = new List<KeyboardHook>();
|
|
private static readonly user32.LowLevelProc Proc = HookCallback;
|
|
private static IntPtr _hookID = IntPtr.Zero;
|
|
|
|
public KeyboardHook()
|
|
{
|
|
if (Instances.Count == 0)
|
|
_hookID = SetHook(Proc);
|
|
Instances.Add(this);
|
|
}
|
|
|
|
public void Dispose()
|
|
{
|
|
Instances.Remove(this);
|
|
if (Instances.Count == 0)
|
|
user32.UnhookWindowsHookEx(_hookID);
|
|
}
|
|
|
|
public event KeyPress? OnKeyPress;
|
|
|
|
private IntPtr SetHook(user32.LowLevelProc proc)
|
|
{
|
|
using (Process curProcess = Process.GetCurrentProcess())
|
|
using (ProcessModule curModule = curProcess.MainModule)
|
|
return user32.SetWindowsHookEx(WH_KEYBOARD_LL, proc, kernel32.GetModuleHandle(curModule.ModuleName), 0);
|
|
}
|
|
|
|
private static IntPtr HookCallback(int nCode, IntPtr wParam, IntPtr lParam)
|
|
{
|
|
if (nCode >= 0 && wParam == (IntPtr) WM_KEYDOWN)
|
|
{
|
|
int vkCode = Marshal.ReadInt32(lParam);
|
|
for (int i = 0; i < Instances.Count; i++)
|
|
Instances[i].OnKeyPress?.Invoke(new KeyboardHookEventArgs((Keys) vkCode));
|
|
}
|
|
|
|
return user32.CallNextHookEx(_hookID, nCode, wParam, lParam);
|
|
}
|
|
}
|
|
} |