Adding a progress bar to a DataGridView in .NET

using System;
using System.Drawing;
using System.Drawing.Printing;
using System.Runtime.InteropServices;
using System.Windows.Forms;
using System.Windows.Forms.VisualStyles;
 
public class DataGridViewProgressBarColumn : DataGridViewColumn
{
 
    public DataGridViewProgressBarColumn()
        : base(new DataGridViewProgressBarCell())
    {
    }
 
    public override DataGridViewCell CellTemplate
    {
        get { return base.CellTemplate; }
        set
        {
 
            // Ensure that the cell used for the template is a CalendarCell. 
            if ((value != null) && !value.GetType().IsAssignableFrom(typeof(DataGridViewProgressBarCell)))
            {
                throw new InvalidCastException("Must be a DataGridViewProgressBarCell");
            }
 
            base.CellTemplate = value;
        }
    }
 
}
 
public class DataGridViewProgressBarCell : DataGridViewTextBoxCell
{
 
    protected override void Paint(Graphics graphics, Rectangle clipBounds, Rectangle cellBounds, int rowIndex, DataGridViewElementStates cellState, object value, object formattedValue, string errorText, DataGridViewCellStyle cellStyle, DataGridViewAdvancedBorderStyle advancedBorderStyle,
        DataGridViewPaintParts paintParts)
    {
        base.Paint(graphics, clipBounds, cellBounds, rowIndex, cellState, value, formattedValue, errorText, cellStyle, advancedBorderStyle, DataGridViewPaintParts.Background);
 
        base.PaintBorder(graphics, clipBounds, cellBounds, cellStyle, advancedBorderStyle);
 
        Rectangle rect = cellBounds;
        rect.Inflate(-3, -3);
 
        rect.Width = (int)value * ProgressBarRenderer.ChunkThickness;
 
        ProgressBarRenderer.DrawHorizontalBar(graphics, rect);
        ProgressBarRenderer.DrawHorizontalChunks(graphics, rect);
 
    }
 
    public override object DefaultNewRowValue
    {
        // Use the current date and time as the default value. 
        get { return string.Empty; }
    }
 
}

                                              

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           if (value.ToString().Length == 0) { value = 0; }
            float percent = (float)((int)value) / 100;
            if (percent > 1) percent = 1;
            if (percent < 0) percent = 0;
            rect.Width = (int)((float)rect.Width * percent);
            graphics.FillRectangle(Brushes.DarkBlue, rect);
 
            this.ToolTipText = Math.Round(percent * 100, 0).ToString() + "%";

                                              

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