Hi, There is a new PDF snapshot of the NCBI C++ Toolkit documentation: ftp://ftp.ncbi.nih.gov/toolbox/ncbi_tools++/DOC/PDF/ncbi_toolkit--Apr_27_2004.pdf The on-line docs are, as usual: http://www.ncbi.nlm.nih.gov/books/bv.fcgi?call=bv.View..ShowTOC&rid=toolkit.TOC&depth=2 Regards, Denis