Как нажать на клавишу через api X11 ?

   void MainWindow:pressKeyButton(){
 // Obtain the X11 display.
       Display *display = XOpenDisplay(0);
       if(display == NULL)
          return -1;
 
    // Get the root window for the current display.
       Window winRoot = XDefaultRootWindow(display);
 
    // Find the window which has the current keyboard focus.
       Window winFocus;
       int    revert;
       XGetInputFocus(display, &winFocus, &revert);
 
    // Send a fake key press event to the window.
       XKeyEvent event = createKeyEvent(display, winFocus, winRoot, true, 0x0041, 0);
       XSendEvent(event.display, event.window, True, 0x0041, (XEvent *)&event);
 
    // Send a fake key release event to the window.
       event = createKeyEvent(display, winFocus, winRoot, false, 0x0041, 0);
       XSendEvent(event.display, event.window, True, 0x0041, (XEvent *)&event);
 
    // Done.
       XCloseDisplay(display);
 
}
 
XKeyEvent createKeyEvent(Display *display, Window &win,
                           Window &winRoot, bool press,
                           int keycode, int modifiers)
{
   XKeyEvent event;
 
   event.display     = display;
   event.window      = win;
   event.root        = winRoot;
   event.subwindow   = None;
   event.time        = CurrentTime;
   event.x           = 1;
   event.y           = 1;
   event.x_root      = 1;
   event.y_root      = 1;
   event.same_screen = True;
   event.keycode     = XKeysymToKeycode(display, 0x0041);
   event.state       = modifiers;
 
   if(press)
      event.type = KeyPress;
   else
      event.type = KeyRelease;
 
 
}