C#

Hi,
 
I am developing now an application that will generate barcode for items and I need the application to print this barcode and I don't have any experience how to integrate with printers.
 
My question what I need to use barcode printers?
Is this a straightforward? or need to know more about Printer API?
 
I've already see articles about specific model "EPSON L90" and its APIs but I need more examples to see how to walkthrough.
 
Thanks 

namespace ExampleConvertList
{
    public partial class Form1 : Form
    {
        private List<TestGridImage> list;

        public Form1()
        {
            InitializeComponent();

            // I want to convert code have got List...
                        list = new List<TestGridImage>()
                       {
                             new TestGridImage() { KeyIndex = 0, KeyIndexAlt = 2 },
                             new TestGridImage() { KeyIndex = 1, KeyIndexAlt = 0 },
                             new TestGridImage() { KeyIndex = 2, KeyIndexAlt = 1 }
                       };
                       this.gridControl1.DataSource = list;

        }
    }

    public class TestGridImage
    {
        private int keyIndex;

        private int keyIndexAlt;

        public int KeyIndex
        {
            get { return keyIndex; }
            set { keyIndex = value; }
        }

        public int KeyIndexAlt
        {
            get { return keyIndexAlt; }
            set { keyIndexAlt = value; }
        }
    }
}