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public void btn_erstellen_Click(object sender, EventArgs e)
        {
            int Spalten = Convert.ToInt32(numUpDown_Katzahl.Value);
            int Zeilen = Convert.ToInt32(numUpDown_qpc.Value);
            int x = 13;

          for (int n = 0; n < Spalten; n++)
            {
                for (int i = 0; i < Zeilen; i++)
                {
                    Button btn_neu = new Button();
                    btn_neu.Location = new System.Drawing.Point(x, y);
                    btn_neu.Text = "Frage " + (i + 1) + " ??";
                    btn_neu.Name = "Frage" + n + i;
                    btn_neu.TabIndex = 0;                  
                    btn_neu.Width = btn_neu_kat[1, 1].Width;
                    this.Controls.Add(btn_neu);
                    btn_Frage[i,n] = btn_neu;
                    this.btn_Frage[i,n].Click += new System.EventHandler(this.btn_Frage_Click);
                    y = y + 40;
                }
                y = 180;
                x = x + 120;
            }
            
        }                    

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private void btn_Frage_Click(object sender, EventArgs e)
        {
            btn_Frage[1,2].BackColor = Color.Red;            
            Button btn = sender as Button;
            btn_Frage[1, 2].Text = "lol";         
            FrageAntwort fa = new FrageAntwort();
            fa.ShowDialog(this);
        }                    

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System.Windows.Forms.Button[,] btn_Frage = new System.Windows.Forms.Button[30,30];