public class GcCharMaskCell : InputManCellBase 

using System;
using System.Windows.Forms;
using System.Drawing;

namespace GrapeCity.Win.MultiRow.InputMan.SampleCode
{
    class GcCharMaskCellDemo : Form
    {
        private GcMultiRow gcMultiRow1 = new GcMultiRow();
        private Label label = new Label();

        public GcCharMaskCellDemo()
        {
            this.Text = "GcCharMaskCell Demo";
            this.Size = new Size(350, 300);

            // Add MultiRow to form
            this.gcMultiRow1.Dock = DockStyle.Fill;
            this.Controls.Add(this.gcMultiRow1);

            this.label.Dock = DockStyle.Bottom;
            this.label.Height = 50;
            this.label.BackColor = SystemColors.Info;
            this.label.Text = " You can only input upper case, and only input 3 chars; In edit mode, hit the F6 to clear the content.";
            this.Controls.Add(label);

            this.Load += new EventHandler(Form1_Load);

            this.StartPosition = FormStartPosition.CenterScreen;
        }
        private void Form1_Load(object sender, EventArgs e)
        {
            GcCharMaskCell gcCharMaskCell1 = new GcCharMaskCell();
            gcCharMaskCell1.CharBoxes.Clear();

            //Allow the  GcCharMaskCell to accept upper case alphabet(A-Z).
            gcCharMaskCell1.Format = "A";

            //Add some CharBoxes to GcCharMaskCell.
            gcCharMaskCell1.CharBoxes.AddRange(new InputBox[] { new InputBox(), new InputBox(), new InputBox() });

            //In edit mode, hit the F6 to clear the content.
            gcCharMaskCell1.ShortcutKeys.Add(Keys.F6, "ShortcutClear");
            
            Template template1 = Template.CreateGridTemplate(new Cell[] { gcCharMaskCell1, gcCharMaskCell1.Clone() as Cell }, 160,
                AutoGenerateGridTemplateStyles.ColumnHeader | AutoGenerateGridTemplateStyles.RowHeaderAutoNumber);

            gcMultiRow1.Template = template1;
            gcMultiRow1.RowCount = 3;
        }

        [STAThreadAttribute()]
        public static void Main()
        {
            Application.EnableVisualStyles();
            Application.Run(new GcCharMaskCellDemo());
        }
    }
}