Hi yall, I haven''t used opengl extensions yet, so please bare with me... I''m in a situation where I need to create multiple opengl rending contexts, i.e. I need multiple video channel. I may have a single card supporting multiple channels (ex. NVidia QuadroPro) or I can install two cards in the same computer, in which case the first will be AGP and the other PCI. Since I have multiple opengl rendering context, do I need to recover and store the address of the extension fonctions per context? From what I read so far, I think so. Does anyone know where I can find source code that can do this for me. I would like to avoid doing it myself if I can and therefore save me a bit of time. I was thinking about storing the extension function addresses in a structure array. When I change the rendering context, I would then using the appropriate index withing my structure array to get access to the functions. Any suggestions would be appreciated.