Thanks Sergey
LibHPF library was firstly ported on vfp by Dorin Vasilescu and can be downloaded in this link:
https://sites.google.com/site/pdfclasses/

I make some works around in: http://yousfi.over-blog.com/2016/04/libharu-hpdf-library.html
and
http://yousfi.over-blog.com/2016/04/libharu-hpdf-library-export-to-pdfs-part-ii.html