lynx-dev unistd.h

[Wong, William]

Hi,

I've download the distribution ver 2.8.2 and am trying to build the code 
using MS Visual C++.
I got to the point where in the file tcp.h, at line 509 :  " #include 
<unistd.h> "
Problem is, there's no such file anywhere in the subdirectory of the 
distribution. I am wondering if this is a Borland C's own header file?? Or 
maybe I didn't download everything, but I've downloaded the lynx2-8-2.zip 
from http://www.slcc.edu/lynx/release/, and unzipped it.
Please advise. Thank you in advance.

William