Juhuuuu ! Es klapt.
Man muss "nur" beim Pixelformatdescriptor PFD_DRAW_TO_BITMAP angeben.
Delphi-Quellcode:
// ...
ZeroMemory(@pfd, sizeof(PIXELFORMATDESCRIPTOR));
pfd.nSize := sizeof(PIXELFORMATDESCRIPTOR);
// ...
pfd.dwFlags := PFD_DRAW_TO_BITMAP or PFD_SUPPORT_OPENGL or PFD_SUPPORT_GDI;
// ...