X11 mouse scroll 제어 질문입니다.

/* fakeMouse.c */   
#include <X11/extensions/XTest.h>  
#include <unistd.h>  
 
int main ()  
{  
  Display *dpy = NULL;  
  XEvent event;  
 
  dpy = XOpenDisplay (NULL);  
 
  /* Get the current pointer position */  
  XQueryPointer (dpy, RootWindow (dpy, 0),  
        &event.xbutton.root, &event.xbutton.window,  
        &event.xbutton.x_root, &event.xbutton.y_root,  
        &event.xbutton.x, &event.xbutton.y,  
        &event.xbutton.state);  
 
  /* Fake the pointer movement to new relative position */  
  XTestFakeMotionEvent (dpy, 0, event.xbutton.x + 100,  
        event.xbutton.y + 50, CurrentTime);  
  XSync(dpy, 0);  
  sleep(3);  
  /* Fake the pointer movement to new absolate position */  
  XTestFakeMotionEvent (dpy, 0, 250, 250, CurrentTime);  
  sleep(3);  
  /* Fake the mouse button Press and Release events */  
  XTestFakeButtonEvent (dpy, 3, True,  CurrentTime);  
  XTestFakeButtonEvent (dpy, 3, False, CurrentTime);  
 
  XCloseDisplay (dpy);  
  return 0;  
}   
 
Build and Run this program:
$ gcc fakeMouse.c -o fakeMouse -lX11 -lXtst -lXext
$ ./fakeMouse