c# GetProcesses doesn't return process which is in focus

Question

I am working on a program which works when specific program is currently in focus(user are using it). To get the processes I use GetProcesses(), but it does not return all of the processes. For example, I cant get CREO Parametric processes. Is there are other way for me to approach this problem?

Method I use:

   public string getActiveWindowName()
        {
            try
            {
                var activatedHandle = GetForegroundWindow();

                Process[] processes = Process.GetProcesses();
                foreach (Process clsProcess in processes)
                {
                    
                    if (activatedHandle == clsProcess.MainWindowHandle)
                    {
                        string processName = clsProcess.ProcessName;
                        Debug.WriteLine(processName);
                        return processName;
                    }
                }
            }
            catch { }
            return null;
        }