(unsigned long) NULL, (XGCValues *) NULL);
/* set the background to black */
XSetBackground(dpy,Data_GC[i],BlackPixel(dpy,XDefaultScreen(dpy)));
(unsigned long) NULL, (XGCValues *) NULL);
/* set the background to black */
XSetBackground(dpy,Data_GC[i],BlackPixel(dpy,XDefaultScreen(dpy)));