Form1

public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
            StreamReader sr = new StreamReader("kulonbsegek.txt");
            while (!sr.EndOfStream)
            {
                int x = int.Parse(sr.ReadLine());
                int y = int.Parse(sr.ReadLine());
                int szelesseg = int.Parse(sr.ReadLine());
                int magassag = int.Parse(sr.ReadLine());
                Kocka k = new Kocka();
                k.Top = y;
                k.Left = x;
                k.Width = szelesseg;
                k.Height = magassag;
                this.Controls.Add(k);
                k.Click += K_Click;
            }
        }

        private void K_Click(object sender, EventArgs e)
        {
            int darab = 0;
            foreach (Kocka k in this.Controls)
            {
                if (k.BackColor == Color.Red)
                {
                    darab++;
                }
            }

            if (darab == 15)
            {
                MessageBox.Show("Nyertél");
            }
        }
    }