# Set the Character Set During Subfile Extraction

You can convert the character set of a subfile at the time the subfile is extracted from the container and before it is filtered. This is most often used to set the character set of a mail message's body text. See Filter PDF Files for more information.

To specify the source character set of a subfile, call `config->source_encoding()` with the appropriate value from the enumerated list `Encoding` in `Keyview_Enumerations.hpp`.

To specify the target character set of a subfile, call `config->target_encoding()` with the appropriate value from the enumerated list `Encoding` in `Keyview_Enumerations.hpp`.

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