5.1. I'm using Windows and I can't find the
dlfcn.h header file! What's the problem?
The problem is that Windows doesn't have the
dlopen API, and thus there is no
dlfcn.h header. There is a similar API
around the LoadLibrary function, and
most of what is written here applies to it, too. Please refer to the
Microsoft Developer Network
Website for more information.
5.2. Is there some kind of dlopen-compatible
wrapper for the Windows LoadLibrary
API?
I don't know of any, and I don't think there'll ever be one
supporting all of dlopen's options.
There are alternatives though: libtltdl (a part of libtool),
which wraps a variety of different dynamic loading APIs, among
others dlopen and
LoadLibrary. Another one is the Dynamic
Module Loading functionality of GLib. You can use one
of these to ensure better possible cross-platform compatibility.
I've never used any of them, so I can't tell you how stable they
are and whether they really work.
You should also read section 4, "Dynamically
Loaded (DL) Libraries", of the Program Library
HOWTO for more techniques to load libraries and
create classes independently of your platform.
Take our 
