From 7f974c09be41c92b2a0259dc6c433581e245078e Mon Sep 17 00:00:00 2001
From: Camilla Berglund
glfwSetWindowFocusCallback function and GLFWwindowfocusfun type for receiving window focus eventsglfwSetWindowIconifyCallback function and GLFWwindowiconifyfun type for receiving window iconification eventswindows simple multi-window test programsharing simple OpenGL object sharing test programglfwOpenWindow for specifying a context the new window's context will share objects withglfwOpenWindowglfwOpenWindow to window hints