#include <stdlib.h>
#include <X11/Xlib.h>

int main( int argc, char **argv )
{
    Display *d = XOpenDisplay(0);
    int s = DefaultScreen(d);
    unsigned int *data = malloc(1026 * 4);
    Atom net_wm_icon = XInternAtom(d, "_NET_WM_ICON", False);
    Atom cardinal = XInternAtom(d, "CARDINAL", False);
    Window w;
    XEvent e;
    w = XCreateWindow(d, RootWindow(d, s), 0, 0, 20, 20, 0,
                      CopyFromParent, InputOutput, CopyFromParent, 0, 0);
    data[ 0 ] = 536870912;
    data[ 1 ] = 536870912;
    XChangeProperty(d, w, net_wm_icon, cardinal, 32,
                     PropModeReplace, (const unsigned char*) data, 1026*4);
    XMapWindow(d, w);
    while(1) XNextEvent(d, &e);
}