You can export data that is defined as graphic and variable graphic. Developing QMF Applications, SC26-4722-05 describes export data file formats in detail.
The data type codes for the header records of exported data are 464 for VARGRAPHIC or 468 for GRAPHIC.
The column width of exported data is the number of double-byte characters in it, which is half the number of bytes that are used to store it. Column data is stored in the data record exactly as it comes from the database, except that SO and SI delimiters are added.