Using X11 to get the mouse position

The code takes dry goods:

#include <X11/Xlib.h>//Every Xlib program must include this #include <assert.h>//I include the To test Return values the lazy way #include <unistd.h>//So we got the profiles for seconds #include <stdio.h> #d
    Efine NIL (0)//A name for the void pointer void AddListener (display* Display, Window R) {//get children list
    unsigned int listnum;
    Window parent;
    Window Root;

    Window *wa;
    Xquerytree (Display, R, &root, &parent, &wa, &listnum);
    if (wa==null) {return;
    int i=0;
    printf ("listnum:%d\n", LISTNUM);
        For (i=0 i<listnum; i++) {Window w=wa[i];
        printf ("Alive here?\n");
        Xwindowattributes tattributes;
        Xgetwindowattributes (Display, w, &tattributes); 
        printf ("map_state:%d,width:%d,height:%d\n", Tattributes.map_state, Tattributes.width, tattributes.height); if (tattributes.map_state==2) {Xselectinput(Display, W, keypressmask);
            } if (tattributes.map_state==2) {//Xselectinput (Display, w, buttonpressmask);
        Xgrabpointer (Display,w,false,buttonpressmask,grabmodeasync,grabmodeasync,none,none,currenttime);
    } addListener (Display, w);
    } int My_handler (Display *d, xerrorevent *e) {printf ("error!\n");
return 1;
    int main () {//Open the display display *display = Xopendisplay (NULL);


    ASSERT (display);

    Xseterrorhandler (My_handler);
    Screen *screen=xdefaultscreenofdisplay (display);
    int Width=xwidthofscreen (screen);
    int Height=xheightofscreen (screen);

    printf ("width:%d,height:%d\n", width, height);

    Window window=xrootwindowofscreen (screen);

    AddListener (display, window);
    Xwindowattributes attributes;

    Xgetwindowattributes (Display, window, &attributes); printf ("map_state:%d,width:%d,height:%d\n", Attributes.map_state, Attributes.width, attributes.height);

    Window FW;
    int state;

    Xgetinputfocus (Display, &AMP;FW, &state);

    Xgetwindowattributes (Display, FW, &attributes); printf ("Focus window---->map_state:%d,width:%d,height:%d\n", attributes.map_state, Attributes.width, attrib

    Utes.height);
    Xsetinputfocus (Display,window,reverttopointerroot,currenttime);
    printf ("Set focus window ok\n");
    Window fw2;
    Xgetinputfocus (Display, &AMP;FW2, &state);
    Xgetwindowattributes (Display, FW, &attributes); printf ("Focus window---->map_state:%d,width:%d,height:%d\n", attributes.map_state, Attributes.width, attrib
    Utes.height);

    printf ("Focus is the same?%d\n", &fw2==&window);

    Xselectinput (Display,fw2,keypressmask);

    Xselectinput (Display,pointerroot,keypressmask);
    int f=1;
            while (f) {if (xpending (display)) {int eq=xeventsqueued (display, queuedalready);
  printf ("Events num in queue:%d\n", eq);          Xevent e;
            Xnextevent (display, &e);
            printf ("Event type:%d\n", E.type);
                if (E.type = = KeyPress) {xkeyevent y=e.xkey;
                unsigned int keycode=y.keycode;
                unsigned int state=y.state;
                printf ("keycode:%d,state:%d\n", KeyCode, state);
            Break
                }else if (e.type==buttonpress) {xbuttonevent Xbutton=e.xbutton;
                printf ("x:%d,y:%d\n", XBUTTON.X,XBUTTON.Y);
            Xsendevent (display,xbutton.window,0,keypressmask,&e);
}} return 0;
 }

Use gcc test.c-lx11 to compile it.