如何用c#将本地的图片显示在excel的指定位置？急

string fileName1=".../test.bmp";
Excel.Application  objApp = new Excel.Application();
objApp.Workbooks.Open(....);
Excel.Sheets objSheets = objApp.Worksheets;
Excel._Worksheet objSheet;
objSheet = (Excel._Worksheet)objSheets.get_Item(1);
objSheet.Shapes.AddPicture(fileName1,Microsoft.Office.Core.MsoTriState.msoTrue,Microsoft.Office.Core.MsoTriState.msoTrue,10,10,102,36);