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           ExcelApplication xla = new ExcelApplication();
           Workbook WB= xla.Create(FileFormat.Xlsx);
           Area areaOne= WB[0].CreateArea["A1:C5"];          
           areaOne.SaveImage("Path/filename.png", System.Drawing.Imaging.ImageFormat.Png, 300, 400);            

	   Dim oExcelApp As New ExcelApplication()           
           Dim wb As Workbook = oExcelApp.Create(FileFormat.Xlsx) 
           Dim areaOne As Area = WB[0].CreateArea["A1:C5"]       
           areaOne.SaveImage("Path/filename.png"), System.Drawing.Imaging.ImageFormat.Png, 300, 400)