Enterprise Architect custom hotkey for Addin - custom-controls

Question

I am currently working on an Enterprise Architect addin, and i really need to use some custom hotkeys for user preference. It is working correctly by using functionality from this article: https://community.sparxsystems.com/community-resources/805-triggering-add-in-functionality-with-custom-hotkeys-in-enterprise-architect , but with this way of using custom hotkeys Enterprise Architect is constantly using one core of the processor massively -> if i remove the addin dll, and delete the key from the registry this problem disappears, and i am sure now that the custom hotkey functionality causes it.
Can anyone help me by offering another way of using custom hotkeys in an enterprise architect addin? Searching for another solution for a long time now, but haven't achieved any progress in it yet.
Tamas
EDIT... FOUND THE SOLUTION: modify InvisibleHotKeyForm.cs and Hotkey.cs
InvisibleHotKeyForm.cs modification:
delete "worker_DoWork" method and
public partial class InvisibleHotKeyForm : Form
{
private const double Button_MilliSec = 10.0;
private readonly IEnumerable<Hotkey> _hotkeys;
private readonly int _thisProcessId;
private int _lastActiveProcessId;
private readonly BackgroundWorker _worker;
private System.Timers.Timer Timer_Button;
public InvisibleHotKeyForm(IEnumerable<Hotkey> hotkeys)
{
InitializeComponent();
this._thisProcessId = Process.GetCurrentProcess().Id;
this._worker = new BackgroundWorker();
this.Timer_Init(10.0);
this._hotkeys = hotkeys;
this._lastActiveProcessId = this._thisProcessId;
Closing += (sender, eventArgs) => ((List<Hotkey>)_hotkeys).ForEach(key => key.Dispose());
}
private void Timer_Init(double Millisec)
{
this.Timer_Button = new System.Timers.Timer();
this.Timer_Button.Elapsed += new ElapsedEventHandler(OnTimedEvent);
this.Timer_Button.Interval = Millisec;
this.Timer_Button.Enabled = true;
}
private void OnTimedEvent(object sender, ElapsedEventArgs e)
{
int id = ActiveProcess.GetActiveProcess().Id;
if (this._lastActiveProcessId == id)
return;
if (this._thisProcessId == id)
{
this.BeginInvoke((Delegate)new MethodInvoker(RegisterHotKeys));
}
else if (this._thisProcessId != id)
{
this.BeginInvoke((Delegate)new MethodInvoker(UnregisterHotKeys));
}
this._lastActiveProcessId = id;
}
.
.
.
and Hotkey.cs modification:
public class Hotkey : IDisposable
{
public const int WM_HOTKEY_MSG_ID = 786;
private Keys Key { get; set; }
private Modifiers Modifiers { get; set; }
public HotkeyHandler Handler { get; private set; }
private int Id { get; set; }
private IWin32Window _registeredWindow;
private bool _registered;
public Hotkey(Keys key, Modifiers modifiers, HotkeyHandler handler)
{
this._registeredWindow = (IWin32Window)null;
this._registered = false;
this.Key = key;
this.Modifiers = modifiers;
this.Handler = handler;
Id = GetHashCode();
}
.
.
.