Once Visual Studio is installed and has been configured to build native Win32 applications, you must install the Gtk+ and gtkmm development packages. First, download and install the Gtk+ development package (listed as gtk+-win32-devel) from the GladeWin32 website. Next, download the gtkmm development package from the Gnome FTP site. Make sure you get the same version of both packages. At the time of this writing, the latest version is 2.10. Do not be afraid of the size of the development packages as they are much larger than the runtime packages which your end users will depend on.