Man pages have been removed to save space. Download the full distribution of
BWidget-1.2.1 from 
ftp://ftp.ncnr.nist.gov/pub/cryst/tcltk/BWidget-1.2.1.tar.gz 
to obtain these pages. 

Look at 
http://cvs.sourceforge.net/cgi-bin/cvsweb.cgi/bwidget/BWman/?cvsroot=tcllib 
for the latest revision of manual pages.