poc-misc/LinePrinterPoC/LinePrinterForm.cs

using ScintillaNET;
using System;
using System.Windows.Forms;

namespace LinePrinterPoC
{
    public partial class LinePrinterForm : Form
    {
        private Scintilla _textBox;
        private LinePrinter _printer;

        public LinePrinterForm()
        {
            InitializeComponent();
        }

        private void LinePrinterForm_Shown(object sender, EventArgs e)
        {
            _printer = new LinePrinter();
            _textBox = new Scintilla { Dock = DockStyle.Fill };
            Controls.Add(_textBox);
            _textBox.BringToFront();
        }

        private void ChooseButton_Click(object sender, EventArgs e)
        {
            if (_printer.ChoosePrinter(this)) PrinterLabel.Text = _printer.PrinterName;
        }

        private void PrintButton_Click(object sender, EventArgs e)
        {
            if (false == _printer.Open("print doc"))
            {
                MessageBox.Show("Open printer fail");
                return;
            }

            MessageBox.Show(
                _printer.Print(_textBox.Text)
                    ? "OK"
                    : "Fail"
            );

            _printer.Close();
        }
    }
}