Returns the version numbers of the OpenGL extension to the window system.
In the X Window System, it returns the GLX version.
In the Microsoft Windows, it returns the Windows version.
returns the major version number of the OpenGL extension.
returns the minor version number of the OpenGL extension.
Return: FALSE if it fails, TRUE otherwise.
Returns the version numbers of the OpenGL extension to the window system.
In the X Window System, it returns the GLX version.
In the Microsoft Windows, it returns the Windows version.