IsPdfPortfolioFromStream Method of the Engine Object
This method finds out if an input PDF file added from the stream is a PDF Portfolio. Each PDF Portfolio file may contain several files of various types (textual documents, presentations, drawings, etc.).
Stream[in] Refers to the interface of the user-implemented object of the type IReadStream containing a PDF file to check if it is a PDF Portfolio or not.Callback[in] This variable refers to the interface of the user-implemented object of the type ImagePasswordCallback which is used to handle possible password requests for accessing PDF files. This parameter is optional and may be 0 in which case password-protected files cannot be checked.Result[out, retval] This parameter returns TRUE if a PDF file is a PDF Portfolio and FALSE if it is not.