Using OpenGL in C# (Tao.Framework)

• Install the Tao Framework, download it here.
• In VisualStudio.net Toolbox, add a new Tab and rename it with a meaningful caption:
• In the new Tab category, right click”Choose Items”:
  
• Browse to the control “SimpleOpenGLControl”
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• Drag the control onto the Windows Form designer, this will automatically add two reference assemblies to the project:
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• Using the object browser to have a closer look at the control, it shows that the class hierarchy is:
  public class SimpleOpenGlControl : System.Windows.Forms.UserControl , Member of Tao.Platform.Windows
  i.e. a user control. The class provides several virtual functions, which, you can inherit from it and override in order to perfom OpenGL renderings in your project.
• Now, compile the program and there will be no error, however, if you run it, you will see a messagebox. And to trouble shoot this, you need to add a few code lines.
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• Add the following code first
  using Tao.OpenGl;
  using Tao.Platform.Windows;
• And then, in the Form.Load event handler add the code below and rerun it, now it works!
  glControl.InitializeContexts(); //Assuming that you have named the control “glControl”;
• Now to render something, you can handle the OnPaint event of the control:
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• Type the demo code to see the results:
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With this, all your previous C++ OpenGL codes can be immigrated to C# with ease.