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using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Windows.Forms;

namespace WindowsFormsApplication
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }

        private void Form1_KeyDown(object sender, KeyEventArgs e){if (e.KeyCode == Keys.Enter)
            {
                MessageBox.Show("Es wurde die Enter-Taste gedrückt");
    pictureBox1.Image = WindowsFormsApplication.Resource1.bla;
                e.Handled = true;
            }
        }
    }
}