private void listBox1_MouseDoubleClick(object sender, MouseEventArgs e)
        {
            String selectedItem = "";

            if (listBox1.SelectedItem != null && (listBox1.SelectedItem.ToString() != ""))
            {
                selectedItem = listBox1.SelectedItem.ToString();
                //.WriteLine(selectedItem);
                controller.SendServerInfo(selectedItem, usernameBox.Text, passwordBox.Text);

                label3.Visible      = false;
                label4.Visible      = false;
                usernameBox.Visible = false;
                passwordBox.Visible = false;
                listBox1.Visible    = false;
                ContentBox.ReadOnly = false;

                spreadsheetPanel1.Visible = true;
                ContentBox.Visible        = true;
                ValueBox.Visible          = true;
                Cell.Visible        = true;
                CellAddress.Visible = true;
                label2.Visible      = true;
                label1.Visible      = true;

                filenameBox.Visible    = false;
                filenamebutton.Visible = false;
                newfilename.Visible    = false;

                this.ActiveControl = ContentBox;
                spreadsheetPanel1.SelectionChanged += OnSelectionChanged;
                // Set the current cell in the panel to A1
                spreadsheetPanel1.SetSelection(0, 0);
                // Update the view of the panel
                OnSelectionChanged(spreadsheetPanel1);
            }
        }