LinuxQuestions.org - some keyboard/mouse events cant be caught-xlib programming

hi ..
i have a problem with this program ,it lists the current window along with window id thet are running on the system,result is that for a particular window id that i enter i got odd result:
for application like firefox or gedit just motion notify event works,non of the other events work??
for my terminal(bash) everything works,key press,keyrelease,mouse notify,mouserelease,...
i dont know why??

//this part get the window id

Code:

Display * dis;

  Display * dis;

        Window w;

        dis = XOpenDisplay (0);

        w=XDefaultRootWindow(dis);

        Atom a = XInternAtom(dis, "_NET_CLIENT_LIST" , 1);

        Atom actualType;

        int format;

        unsigned long numItems, bytesAfter;

        unsigned char *data =0;

        int status = XGetWindowProperty(dis,w,a,0L,(~0L),0,AnyPropertyType,&actualType,&format,&numItems,&bytesAfter,&data);



        if (status >= Success && numItems)

        {

                int *array = (int*) data;

                int k;

                for (k = 0; k < numItems; k++)

                {

                        // get window Id:

                        Window w = (Window) array[k];

                        XSelectInput (dis, w, KeyPressMask |PointerMotionMask |ButtonReleaseMask);

                        char* name = '\0';

                        status = XFetchName(dis, w, &name);

                        if (status >= Success)

                        {

                                printf("Found: %u  %s\n", w, name);

                        }

                        XFree(name);

    

                }

                XFree(data);

        }

//Event handling for windows

Code:

XEvent event;

    while (1)  {

    XNextEvent(dis, &event);

    switch  (event.type) {

          

            //MOUSE LOCATION

            case MotionNotify:

                fprintf(stdout,"x: %d y:%d\n",event.xmotion.x,event.xmotion.y);

            break;    

            

            //KEYBOARD KEY(it does not wok)        

            case KeyPress:

                      fprintf(stdout,"key: %d \n",event.xkey.keycode);

            break;

            //--------------------------------

          



            //KEYBOARD KEY(it does not wok)        

            case KeyRelease:

                    fprintf(stdout,"key: %d \n",event.xkey.keycode);

            break;

            //--------------------------------

          

            case ButtonRelease:

                //show which button is released

                if (event.xbutton.button==1)

                    fprintf(stdout,"mouse left click");

                if (event.xbutton.button==2)

                    fprintf(stdout,"middle left click");

                if (event.xbutton.button==3)

                    fprintf(stdout,"mouse right click");

            break;                

            

        }

    }

}