XSetTransientForHint(display, child, parent);
XChangeProperty(display, child, state, XA_ATOM, 32,
PropModeReplace, (unsigned char*)&modal, 1);
XSetTransientForHint(display, child, parent);
XChangeProperty(display, child, state, XA_ATOM, 32,
PropModeReplace, (unsigned char*)&modal, 1);