private void Form1_Load(object sender, EventArgs e)

        {

            printClass myPrint = new printClass();

            if (!myPrint.init()) { MessageBox.Show("error"); }

            else

            {

                myPrint.print("aaaaaaa");

                myPrint.clo();

                

            }

        }

    }

    public class printClass {

        const uint GENERIC_WRITE = 0x40000000;

        const uint GENERIC_READ = 0x80000000;

        const uint OPEN_EXISTING = 0x03;

        [DllImport("kernel32.dll",CharSet=CharSet.Auto,SetLastError=true)]

        static extern SafeFileHandle CreateFile(string name,uint access,uint shareMode,uint security,uint dispition,uint flag,uint tempfile);

        SafeFileHandle handle;

        FileStream fs;

        public bool init() {

            handle = CreateFile(@"LPT1", GENERIC_WRITE, 0, 0, OPEN_EXISTING, 0, 0);

            if (handle.IsInvalid) { return false; }

            else {

                fs = new FileStream(handle, FileAccess.Write);

                fs.WriteByte(0x1B); fs.WriteByte(0x40);

                return true;

            }

        }

        public void print(string text)

        {

            byte[] bytes = Encoding.ASCII.GetBytes(text);

            fs.Write(bytes, 0, bytes.Length);

        }

        public void scroll() {

            fs.WriteByte(0x1B); fs.WriteByte(0x4A); fs.WriteByte(0x1E);

        }

        public void cate()&nb