下面的代碼使用一個現有的統計圖Excel文件，加載這個文件，設置某一項的值和統計圖的表示方式，然后保存到另一個Excel文件里。如果是VS2005+Office2003，也可以選擇使用Visual Studio Tools for Office來作。

Excel.Application m_objExcel = null;

Excel._Workbook m_objBook = null;

Excel._Chart m_objChart = null;

Excel.ChartGroup m_objChartGroup = null;

Excel.Series m_objSeries = null;

object m_objOpt = System.Reflection.Missing.Value;

try

{

        m_objExcel = new Excel.Application();

        m_objBook =

m_objExcel.Workbooks.Open

("z:\\Book11.xls", m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt,

m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt, m_objOpt);

        m_objChart = (Excel._Chart)m_objExcel.Charts.get_Item(1);

 ;       m_objChart.BarShape = Excel.XlBarShape.xlCylinder;

      ;  m_objChartGroup = (Excel.ChartGroup)m_objChart.ChartGroups(1);

        m_objSeries = (Excel.Series)m_objChartGroup.SeriesCollection(1);         ;            

        m_objSeries.Values = 456;

        m_objExcel.DisplayAlerts = false;

        m_objBook.SaveAs("z:\\Book2.xls";, m_objOpt, m_objOpt,

       m_objOpt, m_objOpt, m_objOpt, Excel.XlSaveAsAccessMode.xlNoChange,

                                m_objOpt, m_objOpt, m_objOpt, m_objOpt);

                        }

catch (Exception ex)

{

        MessageBox.Show(ex.Message);

}

finally

{

        m_objBook.Close(m_objOpt, m_objOpt, m_objOpt);

        m_objExcel.Workbooks.Close();

        m_objExcel.Quit();

System.Runtime.InteropServices.Marshal.ReleaseComObject(m_objBook);

 System.Runtime.InteropServices.Marshal.ReleaseComObject(m_objExcel);

        m_objBook = null;

        m_objExcel = null;

        GC.Collect();

      ;  this.Close();

}

源Excel文件中的統計圖：

經過代碼處理后保存的統計圖：