I am not a professional programmer (and I think I don''t want to be one)
I think that i''ll use Delphi, because i know Delphi better than C++ (i like the Delphi syntax much more) and I want to code OpenGL just for fun.
Thanks for your answers.

If someone tells that Delphi code is slower than C-Code... it''s only a sign that he doesn''t know whats an API and he diffently don''t now both languages...

if you ask me Delphi compiles fast (than VC++ *gg*), but the source is the same. OpenGL is really easy to portable to all other languages, so even C++-Source can be nearly used with "copy&paste"... only your damn f at the end of floats... damn ))

Ceya,
Phobeus