Where can I get the missing X11 header files?

Where can I get the missing X11 header files? Updated: 02/27/02

As you may have noticed, HP does not ship a "full" set of X11 header
(.h) files. You can obtain the missing files from one of three places:

o HP ANSI C or HP ANSI C++ (aCC) optional products

o HP's free HP-UX Linux Porting Kit:
- order CD:
<http://software.hp.com/cgi-bin/swdepot_parser.cgi/cgi/displayProductInfo.pl?productNumber=B9891AA>
- download: <http://devrsrc1.external.hp.com/LPK/>

o the InterWorks FTP site: <ftp://interworks.org/pub/comp.hp/X11R6/>