#include <stdlib.h>

#include <X11/Xlib.h>
#include <X11/extensions/Xfixes.h>

typedef struct _win {
	XWindowAttributes	a;
} win;
void main(void)
{
	Display*dpy = XOpenDisplay(NULL);
	
	win *w = malloc(sizeof(struct _win));
	
	w->a.x = 50;
	w->a.y = 50;
	w->a.width = 500;
	w->a.height = 500;
	
	XFixesCreatePointerBarrier(dpy, DefaultRootWindow(dpy), w->a.x - 10, w->a.y, w->a.x + w->a.width + 10, w->a.y, 0, 0, NULL);
	XFixesCreatePointerBarrier(dpy, DefaultRootWindow(dpy), w->a.x + w->a.width, w->a.y - 10, w->a.x + w->a.width, w->a.y + w->a.height + 10, 0, 0, NULL);
	XFixesCreatePointerBarrier(dpy, DefaultRootWindow(dpy), w->a.x + w->a.width + 10, w->a.y + w->a.height, w->a.x - 10, w->a.y + w->a.height, 0, 0, NULL);
	XFixesCreatePointerBarrier(dpy, DefaultRootWindow(dpy), w->a.x, w->a.y + w->a.height + 10, w->a.x, w->a.y - 10, 0, 0, NULL);
	
	XSync(dpy, 1);
	
	pause();
}