สอบถามการเขียนโค้ดในการแทรกไฟล์รูปภาพใน Excel

        private void insertImage()
        {
            Excel.Application ThisApplication = new Excel.ApplicationClass();
            Excel.Workbook ThisWorkBook;

            string _stFileName = @"D:\A1.xlsx";
            string _stPicture = @"D:\test.png";
            object missing = System.Reflection.Missing.Value;

            try
            {
                ThisWorkBook = ThisApplication.Workbooks.Open(_stFileName, missing, missing, 5, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing, missing);
                Excel.Worksheet ThisSheet = (Excel.Worksheet)ThisWorkBook.Sheets[1];
                Excel.Range oRange = (Excel.Range)ThisSheet.Cells[10, 1];
                Image oImage = Image.FromFile(_stPicture);
                oRange.set_Item(10, 1, oImage);
                ThisSheet.Paste(oRange, _stPicture);
                ThisWorkBook.Save();
                MessageBox.Show("OK");
            }
            catch (Exception oEx)
            { }
            finally
            {
                ThisApplication.Quit();
                ThisWorkBook = null;
                ThisApplication = null;
            }
        }