Was Nufis beschäftigt….

using System;
using System.Runtime.InteropServices;
using System.Text;
using System.Windows.Forms;
 
namespace Uhr
{
    public partial class Form1 : Form
    {
        [DllImport("winmm.dll", EntryPoint = "mciSendStringA", CharSet = CharSet.Ansi)]
        protected static extern int mciSendString
        (string mciCommand,
        StringBuilder returnValue,
        int returnLength,
        IntPtr callback);
        [DllImport("kernel32.dll")]
        public static extern bool Beep(int frequency, int duration);
 
        public Form1()
        {
            InitializeComponent();
        }
 
        private void button1_Click(object sender, EventArgs e)
        {
            for [...]