public NativeKeyWatcher()
: base()
{
IntPtr KeyboardProcessor(int nCode, IntPtr wParam, IntPtr lParam)
{
if (nCode >= 0 && wParam == (IntPtr)Native.WM_KEYDOWN)
{
var keyCode = Marshal.ReadInt32(lParam);
this.HandleKey(keyCode);
}
return(Native.CallNextHookEx(this.hookId, nCode, wParam, lParam));
}
IntPtr SetHook()
{
this.keyboardProc = new Native.LowLevelKeyboardProc(KeyboardProcessor);
using (var process = Process.GetCurrentProcess())
{
using (var module = process.MainModule)
{
return(Native.SetWindowsHookEx(Native.WH_KEYBOARD_LL,
this.keyboardProc,
Native.GetModuleHandle(module.ModuleName), 0));
}
}
}
this.hookId = SetHook();
}
protected virtual void Dispose(bool disposing)
{
if (!this.isDisposed)
{
Native.UnhookWindowsHookEx(this.hookId);
this.keyboardProc = null;
this.isDisposed = true;
}
}
static KeybordCapture()
{
s_hook = Native.SetWindowsHookEx(Native.WH_KEYBOARD_LL,
s_proc = new Native.LowLevelKeyboardProc(LowLevelKeyboardProc),
System.Runtime.InteropServices.Marshal.GetHINSTANCE(typeof(KeybordCapture).Module),
//Native.GetModuleHandle(null),
0);
AppDomain.CurrentDomain.DomainUnload += delegate
{
if(s_hook != IntPtr.Zero)
Native.UnhookWindowsHookEx(s_hook);
};
}
/// <summary>
/// Unregisters the keyboard hook.
/// </summary>
public void Unregister()
{
try
{
Logger.Write("KManager.Unregister(): Unregistering keyboard hook using id: " + _hookID);
Native.UnhookWindowsHookEx(_hookID);
_proc = null;
_hookID = IntPtr.Zero;
Logger.Write("KManager.Unregister(): Unregistered keyboard hook. ");
}
catch (Exception ex)
{
Logger.Write("Error. " + ex.Message, MessagePriority.High, MessageKind.Error);
}
}
static KeybordCapture()
{
s_hook = Native.SetWindowsHookEx(Native.WH_KEYBOARD_LL,
s_proc = new Native.LowLevelKeyboardProc(LowLevelKeyboardProc),
System.Runtime.InteropServices.Marshal.GetHINSTANCE(typeof(KeybordCapture).Module),
//Native.GetModuleHandle(null),
0);
AppDomain.CurrentDomain.DomainUnload += delegate
{
if (s_hook != IntPtr.Zero)
{
Native.UnhookWindowsHookEx(s_hook);
}
};
}
/// <summary>
/// Registers the keyboard hook with low-level keyboard procedure.
/// </summary>
public void Register()
{
try
{
Logger.Write("KManager.Register(): Registering hook...", MessagePriority.Low, MessageKind.Info);
if (_proc != null || _hookID != IntPtr.Zero)
{
Native.UnhookWindowsHookEx(_hookID);
_proc = null;
_hookID = IntPtr.Zero;
}
_proc = HookCallback;
_hookID = Native.SetHook(_proc);
Logger.Log("KManager.Register(): Registered keyboard hook with hook id: " + _hookID);
Logger.Notify("The application can now intercept or forward keyboard input. ", MessageKind.Info);
}
catch (Exception ex)
{
Logger.Write(ex.Message, MessagePriority.High, MessageKind.Error);
}
}
internal static extern IntPtr SetWindowsHookEx(
int idHook, Native.LowLevelKeyboardProc lpfn, IntPtr hMod, uint dwThreadId);
