Code to write image to excel.

Hello all,
I developed a code to write data into cell, this is the code:
Excel. Application oAppln = new Excel. Application ();
Excel.Workbook oWorkBook = (Excel.Workbook)(oAppln.Workbooks.Add(@"D:workabcd.xls"));
Excel.Worksheet oWorkSheet = (Excel.Worksheet)oWorkBook.ActiveSheet;
oWorkSheet.Cells[1,1] = img;
Now I need help in getting code to write image to excel file, please.
