CVI导出EXCEL中的图片

开发环境是Lab Windows CVI，需要通过代码打开EXCEL，并导出该EXCEL中的几张图片到指定文件夹中。需要实现这个功能的代码。

using Microsoft.Office.Interop.Excel;
     public static bool Convert(string sourcePath, string targetPath, XlFixedFormatType targetType)
    {
    	 bool result;
    	 object missing = Type.Missing;
    	 Microsoft.Office.Interop.Excel.Application application = null;
    	 Workbook workBook = null;
    	 try
    	 {
    	     application = new Microsoft.Office.Interop.Excel.Application();
    	     object target = targetPath;
    	     object type = targetType;
    	     workBook = application.Workbooks.Open(sourcePath, missing, missing, missing, missing, missing,
    	         missing, missing, missing, missing, missing, missing, missing, missing, missing);
    	
    	     workBook.ExportAsFixedFormat(targetType, target, XlFixedFormatQuality.xlQualityStandard, true, false, missing, missing, missing, missing);
    	     result = true;
    	 }
    	 catch
    	 {
    	     result = false;
    	 }
    	 finally
    	 {
    	     if (workBook != null)
    	     {
    	         workBook.Close(true, missing, missing);
    	         workBook = null;
    	     }
    	     if (application != null)
    	     {
    	         application.Quit();
    	         application = null;
    	     }
    	     GC.Collect();
    	     GC.WaitForPendingFinalizers();
    	     GC.Collect();
    	     GC.WaitForPendingFinalizers();
    	 }
    	 return result;
    }

static void Main(string[] args)
  {
        string excelfilePath = ReadIni(@"c:\\file_important\\inicfg.ini", "INFO_R", "epath", "DefaultName");
        string pdffilePath = ReadIni(@"c:\\file_important\\inicfg.ini", "INFO_R", "ppath", "DefaultName");

       //  bool result = Program.Convert("C:\\report.xls", "C:\\测试报告", XlFixedFormatType.xlTypePDF);
        bool result = Program.Convert(excelfilePath, pdffilePath, XlFixedFormatType.xlTypePDF);
        //如果转换成功
        if (result)
        {
           
        }

    }