Hi Lam,
 
I am using Dev-C++ and cygwin in mswindows using plplot. To create the libraries
I only had to do ,from a cygwin console, in the directory where I have the plplot:
./configure-disable-tcl -disable-itcl
make
 
Note. you need some of the last cvs from plplot to compile wiht cygwin I had plplot-5.2.1.cvs.20031227
 
That all.
 
Later in the Dev-c++ Ide (I suppose you have configured it to use cygwin) the only thing I needed was
to put the  "plplot-5.2.1.cvs.20031227/bindings/c++/.libs/libplplotcxxd.dll.a" library in the
project->options->parameteres->linker using add library.
 
 To make the program work later, you need to have in your path the cygplplotcxxd-9.dll, cygplplotd-9.dll
and cygcsirocsa-0.dll plplot libraries.
Note. also of course  the usual cygwin's dll. If you dontīt have put them the program will warn you telling
the name of the librarie required.
 
Regards
S.Calderon