glutCreateWindow - creates a top-level window.
int glutCreateWindow(char *name);
glutCreateWindow creates a top-level window. The name will be provided to the window system as the window's name. The intent is that the win- dow system will label the window with the name.
Implicitly, the current window is set to the newly created window.
Each created window has a unique associated OpenGL context. State changes to a window's associated OpenGL context can be done immediately after the window is created.
The display state of a window is initially for the window to be shown. But the window's display state is not actually acted upon until glut- MainLoop is entered. This means until glutMainLoop is called, rendering to a created window is ineffective because the window can not yet be displayed.
The value returned is a unique small integer identifier for the window. The range of allocated identifiers starts at one. This window identi- fier can be used when calling glutSetWindow.
The proper X Inter-Client Communication Conventions Manual (ICCCM) top- level properties are established. The WM_COMMAND property that lists the command line used to invoke the GLUT program is only established for the first window created.