I trying to convert a file to PDF, before loading the file in to the Workbook I make sure that Cells is able to process the file by calling CellsHelper.DetectFileFormat.
When you supply the CellsHelper.DetectFileFormat method with a MSG file then you receive a FileFormatType.Default value. Is this correct or should you receive a FileFormatType.Unkown.
Well, generally, you are rightly saying. Since MSG is not the native excel file format type, so it should not return Excel2003 as default file format type while using CellsHelper.DetectFileFormat(msgfilepath) rather Unknown looks more suitable.
Anyways, we will further analyze which way it should be done, whether we should retain as it is or according to your suggestion or else. We will get back to you soon.
As per your suggestion, we will return Unkown if the file format is ppt or MSG for your requirement. A supported version would be provided to you as soon as it is supported.