I want to know that is there a way to identify the graphic card using in our machine is an external or inbuilt one from the code? I am using c++ and opengl.
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1I'm curious as to why you need to know. – Pubby Oct 25 '12 at 03:38
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Yeah, I want to change some opengl rendering in my project depending on the fact that video card is external or not. – gishara Oct 25 '12 at 03:43
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1External like the [Quadroplex](http://www.nvidia.com/object/product-quadroplex-7000-us.html)? Or external like a USB [DisplayLink](http://en.wikipedia.org/wiki/DisplayLink) dongle? – genpfault Oct 25 '12 at 04:12
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It is like Quadroplex. Thanks. – gishara Oct 25 '12 at 10:33
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You probably want to get the supported extensions? There exist a library called GLEW that is used to get the supported extensions. See Using GLEW to use OpenGL extensions under Windows
The alternative is to do an OS specific device query. (so you need to give us an OS before we go that route)
