XSetWindowAttributes attr;
  XClassHint *xch;
  MWMHints mwmhints;
  Atom prop = None;
  attr.backing_store = NotUseful;
  attr.override_redirect = False;
  attr.colormap = cm;
  attr.border_pixel = 0;
  attr.background_pixel = 0;
  attr.save_under = False;
  attr.event_mask =
    StructureNotifyMask | ButtonPressMask | ButtonReleaseMask |
    PointerMotionMask | EnterWindowMask | LeaveWindowMask | KeyPressMask |
    KeyReleaseMask | ButtonMotionMask | ExposureMask | FocusChangeMask |
    PropertyChangeMask | VisibilityChangeMask;

  if (opt.borderless || ret->full_screen) {
    prop = XInternAtom(disp, "_MOTIF_WM_HINTS", True);
    if (prop == None) {
      weprintf("Window Manager does not support MWM hints. "
               "To get a borderless window I have to bypass your wm.");
      attr.override_redirect = True;
      mwmhints.flags = 0;
    } else {
      mwmhints.flags = MWM_HINTS_DECORATIONS;
      mwmhints.decorations = 0;
    }
  } else
    mwmhints.flags = 0;

  ret->win =
    XCreateWindow(disp, DefaultRootWindow(disp), x, y, w, h, 0, depth,
                  InputOutput, vis,
                  CWOverrideRedirect | CWSaveUnder | CWBackingStore |
                  CWColormap | CWBackPixel | CWBorderPixel | CWEventMask,
                  &attr);

  if (mwmhints.flags) {
    XChangeProperty(disp, ret->win, prop, prop, 32, PropModeReplace,
                    (unsigned char *) &mwmhints, PROP_MWM_HINTS_ELEMENTS);
  }

  XSetWMProtocols(disp, ret->win, &wmDeleteWindow, 1);