The SubfileExtractInfo Struct

Provides information about a subfile that has been extracted.

struct SubfileExtractInfo
{
    bool may_contain_subfiles;
    bool charset_converted;
    bool external;
    bool non_formatted_body_extracted;
};
Member Description
may_contain_subfiles Whether the extracted file may contain subfiles and should be extracted further.
charset_converted Whether the subfile's character encoding was converted.
external Whether the subfile is embedded in the main file as a link and is stored externally. This type of subfile cannot be extracted because it is not stored in the container.
non_formatted_body_extracted When formatted_mail is true, specifies whether a mail message was extracted as plain text due to an error extracting its formatted version.