glutHideWindow - Man Page
Make the current window hidden
Library
OpenGLUT - window
Synopsis
#include <openglut.h>
void
glutHideWindow(void);
Description
Even if a window is ``open'', it need not be visible. It may be convenient to hide a window rather than to close it, if you want to re-display the window at the same location and size, later. Redefining all of the OpenGLUT features of a window and adding its
window id
to your tracking when re-opening a window may also be bothersome. So, rather than destroying it, you can simply ask for it to be hidden.