Marked as 'AdvertsingProfitControl v 0.8.5' by its folder name. The 'Add Records' form has been finshed to at least include all the information the Advertising Profit Control sheet had.

AdvertsingProfitControl/HMergedCell.cs

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+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.Data;
+using System.Drawing;
+using System.Text;
+using System.Windows.Forms;
+using System.Diagnostics;
+using System.Drawing.Drawing2D;
+
+namespace AdvertsingProfitControl
+{
+    //http://forums.codeguru.com/showthread.php?415930-DataGridView-Merging-Cells
+    public class HMergedCell : DataGridViewTextBoxCell
+    {
+        private int m_nLeftColumn = 0;
+        private int m_nRightColumn = 0;
+
+        /// <summary>
+        /// Column Index of the left-most cell to be merged.
+        /// This cell controls the merged text.
+        /// </summary>
+        public int LeftColumn
+        {
+            get
+            {
+                return m_nLeftColumn;
+            }
+            set
+            {
+                m_nLeftColumn = value;
+            }
+        }
+
+        /// <summary>
+        /// Column Index of the right-most cell to be merged
+        /// </summary>
+        public int RightColumn
+        {
+            get
+            {
+                return m_nRightColumn;
+            }
+            set
+            {
+                m_nRightColumn = value;
+            }
+        }
+
+        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)
+        {
+            try
+            {
+                int mergeindex = ColumnIndex - m_nLeftColumn;
+                int i;
+                int nWidth;
+                int nWidthLeft;
+                string strText;
+
+                Pen pen = new Pen(Brushes.Black);
+
+                // Draw the background
+                graphics.FillRectangle(new SolidBrush(SystemColors.Control), cellBounds);
+
+                // Draw the separator for rows
+                graphics.DrawLine(new Pen(new SolidBrush(SystemColors.ControlDark)), cellBounds.Left, cellBounds.Bottom - 1, cellBounds.Right, cellBounds.Bottom - 1);
+
+                // Draw the right vertical line for the cell
+                if (ColumnIndex == m_nRightColumn)
+                    graphics.DrawLine(new Pen(new SolidBrush(SystemColors.ControlDark)), cellBounds.Right - 1, cellBounds.Top, cellBounds.Right - 1, cellBounds.Bottom);
+
+                // Draw the text
+                RectangleF rectDest = RectangleF.Empty;
+                StringFormat sf = new StringFormat();
+                sf.Alignment = StringAlignment.Center;
+                sf.LineAlignment = StringAlignment.Center;
+                sf.Trimming = StringTrimming.EllipsisCharacter;
+
+                // Determine the total width of the merged cell
+                nWidth = 0;
+                for (i = m_nLeftColumn; i <= m_nRightColumn; i++)
+                    nWidth += this.OwningRow.Cells[i].Size.Width;
+
+                // Determine the width before the current cell.
+                nWidthLeft = 0;
+                for (i = m_nLeftColumn; i < ColumnIndex; i++)
+                    nWidthLeft += this.OwningRow.Cells[i].Size.Width;
+
+                // Retrieve the text to be displayed
+                strText = this.OwningRow.Cells[m_nLeftColumn].Value.ToString();
+
+                rectDest = new RectangleF(cellBounds.Left - nWidthLeft, cellBounds.Top, nWidth, cellBounds.Height);
+                graphics.DrawString(strText, new Font("Arial", 10, FontStyle.Regular), Brushes.Black, rectDest, sf);
+            }
+            catch (Exception ex)
+            {
+                Trace.WriteLine(ex.ToString());
+            }
+        }
+    }// class
+}