Have down loaded and facilitated all of the OpenGL commands and am using in the Microsoft Visual Studio, C++ software. However, after calling the software to display graphic information, I found out that I have to provide the #include <…> and library information to utilize the winio@ window software to open a window in C++. This software is automatically available in the Fortran compiler but has to be built with the C++ compiler. I was told that the OpenGL web site has the software available to download and install to use in the C++ compiler under the Visual Studio software. Anyone have an idea how to do and where to access the software to download? Sid Kraft