#include <X11/Xlib.h>
#include <stdio.h>

int main(void)
{
  Display *d = XOpenDisplay(0);
  Window w;
  XEvent ev;

  if (!d) {
    fprintf(stderr, "can't open display\n");
    return 1;
  }

  w = XCreateSimpleWindow(d, DefaultRootWindow(d), 0, 0, 470, 40, 0, 0, 0);
  XSelectInput(d, w, VisibilityChangeMask);
  XMapWindow(d, w);
  while (1) {
    XNextEvent(d, &ev);
    XRaiseWindow(d, w);
  }
}