Obwohl ich Deutsch one schwierigkeit Lese, schreibe ich es nicht mehr gut. Deshalb in English:

Windows 10. Delphi XE2. OpenGL 4.6 - Headertranslation

I draw 2D curves in single-buffer mode. This works perfectly.

Now I wish to show some animation (still in the 2D) and this calls for the double-buffer. How do I do that? Schreiben Sie gerne auf Deutsch!

Here is the current try: The program is in the IdleHandler and from here I call as shown below. Windows punishes me with "The pixelformat is invalid" in the CreateRenderingContext.

Regards,
ChG

To be honest, I can't see a flaw.
Can you use the window specific context creation? Maybe the older compiler and the newer graphique driver have problems itself.
And since I would recommand that you use a 'newer' OpenGL version, you also need wgl functions
https://www.khronos.org/opengl/wiki/Creating_an_OpenGL_Context

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