C#

string text=File.ReadAllText(path);
foreach (Match m in Regex.Matches(text, @"MERKMAL \$([0-9]*)\$")) {
    log("found: "+m.Groups[1]);
}

public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        Process[] processesBefore;
        Process[] processesAfter;
        private void Form1_Load(object sender, EventArgs e)
        {
            processesBefore = Process.GetProcesses();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            processesAfter = Process.GetProcesses();
            CompareProcesses compare = new CompareProcesses();
            IEnumerable<Process> theDifference = processesAfter.Except(processesBefore, compare);
            foreach (Process p in theDifference)
            {
                listboxDifference.Items.Add(p.ProcessName);
            }
        }
    }

    public class CompareProcesses : IEqualityComparer<Process>
    {
        public bool Equals(Process x, Process y)
        {
            return (x == y);
        }

        public int GetHashCode(Process obj)
        {
            return obj.GetHashCode() ^ obj.GetHashCode();
        }
    }