OpenGL and Windows

I'm starting to me more interesting in 3D graphic. Looking for some information about OpenGL on Windows I found Lucian Wischik old webpage. Maybe information collected on it isn't the latest news, but at least one thing is quite interesting. There is a register key which keep information about which library provided OpenGL functionality on your computer. HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\OpenGLDrivers. The another interesting finding is OpenGL Extension Viewer provided by RealTech-Vr. It works on Windows, MacOSX and under Wine.