From Xojo Documentation
Sets up OpenGL on all platforms and provides basic functionality. It does the basic setup of OpenGL on each platform. It's up to you to clear buffers and do all the OpenGL drawing.
The DesktopOpenGLSurface control and the OpenGL module are based on the OpenGLSurface plug-in from Tinrocket, LLC at http://2002-2010.tinrocket.com/software/openglsurface/index.html.
The OpenGL module contains all the OpenGL calls, functions, and constants that you will need. See http://www.opengl.org/ for the OpenGL documentation. The online version of the Red Book for OpenGL 1.1 is available at http://www.glprogramming.com/red.
- OpenGL uses a per-thread context.
- All of the functions in the OpenGL module affect the current context.
- The current OpenGL context is undefined outside of an DesktopOpenGLSurface Opening, Resized or Render event.
- DesktopOpenGLSurface.MakeCurrent can be used to make a specific OpenGLCanvas the current context.