Window root, child;
int rx, ry, wx, wy;
unsigned int mask;

XQueryPointer(display, win, &root, &child, &rx, &ry, &wx, &wy, &mask);
checkColorPointer( rx+3, ry);

/*++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
# Function that would check the color of the current mouse pointer.
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++*/
void
checkColorPointer( int rx,
int ry )
{
Display *dpy;
Window rootWin;
char *fname = (char *) 0;
char *display_str = (char *) 0;
XImage *xi;
int x0, y0;
unsigned RDwidth, RDheight;
unsigned int RDflags = 0;

XColor rgb;
Colormap colormap;

RDflags |= XRD_READ_POINTER;

x0 = rx;
y0 = ry;
RDwidth = SQUARE_SCREEN_SHOT;
RDheight = SQUARE_SCREEN_SHOT;

if( display_str == (char *) 0 )
{
display_str = "";
}

if( fname == (char *) 0 )
{
fname = "pointerImage.rgb";
}

dpy = XOpenDisplay(display_str);

if (dpy == 0)
{
printf("Unable to open display
");
exit(1);
}

rootWin = RootWindow( dpy, DefaultScreen(dpy));

if ( ( RDwidth != 0 ) && ( RDheight != 0 ) )
{

XGrabServer( dpy ); /* Try to grab the X server to "pause" it*/
XSync( dpy, False );

xi = XReadDisplay( dpy, rootWin, x0, y0, RDwidth, RDheight, RDflags, 0);

rgb.pixel = XGetPixel(xi, 0, 0);
colormap = DefaultColormap(dpy, DefaultScreen(dpy));
XQueryColor(dpy, colormap, &rgb);
printf("
Pixel %3ld -- Red %02x -- Green %02x -- Blue %02x
", rgb.pixel, rgb.red>>=8, rgb.green>>=8, rgb.blue>>=8);

}

XDestroyImage(xi);
XCloseDisplay(dpy);

}