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#include <iostream>
#include <ctime>
#include <unistd.h> /* for usleep() */
#include <X11/Xlib.h>
#include <X11/Xutil.h>

int main(int argc, char *argv[])
{
  Display *dpy = XOpenDisplay( 0 ); //connect to xserver
  Window root = DefaultRootWindow( dpy ); //we working on the X-root window
  XEvent event;

  Window   grab_window     =  root;
  Bool          owner_events    = False;
  int             pointer_mode     = GrabModeAsync;
  int             keyboard_mode = GrabModeAsync;

  //We only interested in KeyPress Events
  XSelectInput(dpy, root, KeyPressMask);
  //Grap all keyboard events
  XGrabKeyboard( dpy,  grab_window, owner_events, pointer_mode, keyboard_mode, CurrentTime );

  while (1)
  {
    //Step events
    XNextEvent(dpy, &event);
    //if KeyPress event found check for right keys
    if( event.type == KeyPress )
    {
     //keys are defined in keysymdef.h from the X11 development files
      if( event.xkey.keycode == XKeysymToKeycode( dpy, XK_F1) ) std::cout << "F1 pressed\n";
      if( event.xkey.keycode == XKeysymToKeycode( dpy, XK_F10) ) std::cout << "F10 pressed\n";
      if( event.xkey.keycode == XKeysymToKeycode( dpy, XK_Q) ) break;
     }
     usleep(100); //cool down the prozessor a little bit
    }
    XUngrabKeyboard( dpy, CurrentTime );
    XCloseDisplay( dpy );
  return 0;
}