gistfile1.cpp

    window = glfwCreateWindow(1024, 768, "Test", NULL, NULL);

    glfwMakeContextCurrent(window);

    glfwSwapInterval(1);


while(1) {


  if (glfwGetKey(window, GLFW_KEY_F)) {
            glfwDestroyWindow(window);
            window = NULL;

            GLFWwindow * newWindow;
            
            if (fullscreen) {
                newWindow = glfwCreateWindow(1024, 768, "Test", NULL, NULL);
                fullscreen = false;
            } else {
                newWindow = glfwCreateWindow(1024, 768, "Test", glfwGetPrimaryMonitor(), NULL);
                fullscreen = true;
            }
            
            glfwMakeContextCurrent(newWindow);
            glfwSwapInterval(1);
        }
        
        // Swap buffers
        glfwSwapBuffers(window);
        glfwPollEvents();

}