/// <summary>
        /// The method get triggered, when the "connect"button is clicked. I loads all relevant values from the textboxes and calls
        /// the FileOverview.
        /// </summary>
        /// <param name="sender"></param>
        /// <param name="e"></param>
        private void ConnectButtonClick(object sender, EventArgs e)
        {
            string server = serverBox.Text;

            if (!server.Equals(""))
            {
                //this.Enabled = false;
                if (saveBox.CheckState == CheckState.Checked)
                {
                    try
                    {
                        RegistryKey key = Registry.LocalMachine.CreateSubKey(regDir);
                        key.SetValue(regKeySrv, server);
                        key.SetValue(regKeyLogin, loginBox.Text);
                        key.Close();
                    }
                    catch (Exception ex)
                    {
                        MessageBox.Show("You have to be logged in as Administrator or run the program as Administrator in order to save settings.", "Error while trying to save settings", MessageBoxButtons.OK, MessageBoxIcon.Information);
                    }
                }

                //this.Visible = false;
                ConnectionMessage.Text = "Logging into the server. Please wait ...";
                this.Update();
                //fo = new FileOverview(server, loginBox.Text, passwordBox.Text, this);

                client = new Client(server, loginBox.Text, passwordBox.Text);

                if (client.isLogined)
                {
                    this.Enabled = false;
                    this.Visible = false;
                    fo = new FileOverview(client, server, this);
                    fo.SetVisible();
                }
                else
                {
                    try
                    {
                        if (!client.isConnected())
                            ConnectionMessage.Text = "Failed to connect to the server.\nPlease check your ip address.";
                        else
                            ConnectionMessage.Text = "Login failed. Please verify your user id and password.";

                    }
                    catch (System.NullReferenceException)
                    {
                        ConnectionMessage.Text = "Failed to connect to the server.\nPlease check your ip address.";

                    }
                }
            }
            else
            {
                MessageBox.Show("Please enter serveraddress", "Address missing", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }
        private void dbOpenButton_Click(object sender, EventArgs e)
        {
            if (dbNameTextBox.Text != "")
            {
                this.Enabled = false;
                this.Visible = false;
                    fo = new FileOverview(this, dbNameTextBox.Text);
                    fo.SetVisible();

            }
            else
            {
                MessageBox.Show("No data found...", "", MessageBoxButtons.OK, MessageBoxIcon.Error);
             }
        }