[Gretl-devel] where is libgretl.h?

Hi Dear Gretl Guys, Sorry to bother you guys but I've been struggling for several days on this. I am trying to write a C++ program on Windows that I want to use some gretl functions, like nadarwat(). But I just cannot compile with libgretl. I can't find libgretl.h, let alone its .lib file even though I did see libgretl.dll under my "C:\Program Files (x86)\gretl" directory. This is what I did. I followed instruction from http://gretl.sourceforge.net/win32/ and installed. gretl-1.9.7.exe, but I did NOT find any header file that I can compile with. I then download gretl with source code gretl-1.9.7.tar.bz2 but I am not sure I know how to build it on Windows(I am only familiar with Visual Studio IDE). From my understanding of gretl on Windows, once I run gretl-1.9.7.exe, it should install gretl GUI and libgretl automatically, right? libgretl is for people who  want to write their own C++ program to compile and link with gretl, right? But where is libgretl.h and possibly libgretl.lib after running gretl-1.9.7.exe? Are they supposed to be simple to find? Really need your guys help. Thanks a lot in advance. Lake