Yes, a source code license for Foxit Quick PDF Library can be purchased through our online store.
A source license allows the licensee to modify the source code for their own needs as part of a non-competing compiled solution, but may not redistribute it in non-compiled form. Foxit shall retain all rights, title and interest in and to all corrections, modifications and derivative works of the source code created by the licensee, including all copyrights subsisting therein, to the extent such corrections, modifications or derivative works contain copyrightable code or expression derived from the source code.