exporting datagrid to excel along with the company logo, name and address

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C#

ASP.NET

Windows

MS-Excel

, +

Im doing a windows application on store management for a company, I have exported my datagrid successfully to excel but I would like to know if there is a way to set a header to the document similar to a company letter head with its name, logo and address.
The code I used to export my datagrid was

private void button2_Click_1(object sender, EventArgs e)
       {
           Excel.Application app = new Excel.Application();
           app.Visible = true;
           Excel.Workbook wb = app.Workbooks.Add(1);
           Excel.Worksheet ws = (Excel.Worksheet)wb.Worksheets[1];
           // changing the name of active sheet
           ws.Name = "Exported from gridview";

           ws.Rows.HorizontalAlignment = HorizontalAlignment.Center;
           // storing header part in Excel
           for (int i = 1; i < dataGridView1.Columns.Count + 1; i++)
           {
               ws.Cells[1, i] = dataGridView1.Columns[i - 1].HeaderText;
           }


           // storing Each row and column value to excel sheet
           for (int i = 0; i < dataGridView1.Rows.Count - 1; i++)
           {
               for (int j = 0; j < dataGridView1.Columns.Count; j++)
               {
                   ws.Cells[i + 2, j + 1] = dataGridView1.Rows[i].Cells[j].Value.ToString();
               }
           }

           // sizing the columns
           ws.Cells.EntireColumn.AutoFit();

           // save the application
           wb.SaveAs("D:\\output.xls", Type.Missing, Type.Missing, Type.Missing, Type.Missing, Type.Missing, Microsoft.Office.Interop.Excel.XlSaveAsAccessMode.xlExclusive, Type.Missing, Type.Missing, Type.Missing, Type.Missing);

           // Exit from the application
           app.Quit();
       }

Please help me with this, what modification should i do to add the company details in the header in the excel doc automatically while exporing