public void ClearHook()
{
if (_keyboardHookHandle != IntPtr.Zero)
{
int result = KeyboardHookLowLevel.UnhookWindowsHookEx(_keyboardHookHandle);
_keyboardHookHandle = IntPtr.Zero;
_keyboardDelegate = null;
if (result == 0)
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
}
}
public void SetHook()
{
if (_keyboardHookHandle == IntPtr.Zero)
{
_modifiers = Keys.None;
_keyboardDelegate = KeyboardHookProc;
_keyboardHookHandle = KeyboardHookLowLevel.SetWindowsHookEx(WH_KEYBOARD_LL, _keyboardDelegate, Marshal.GetHINSTANCE(Assembly.GetExecutingAssembly().GetModules()[0]), 0);
if (_keyboardHookHandle == IntPtr.Zero)
{
throw new Win32Exception(Marshal.GetLastWin32Error());
}
}
}