Why do none of my friends know xlib?

static int getWindowColor( Display *display, XColor *color, int x, int y )
{
   Window target_window;
   XImage *ximage;
   int rev;

   XGetInputFocus( display, &target_window, &rev );

   if (target_window == (Window) NULL) {
      printf( "target window is null\n" );
      return(0);
   }

   ximage = XGetImage( display, target_window, x, y, 1, 1, AllPlanes, ZPixmap);
   if ( ximage == (XImage *) NULL ) {
      printf( "ximage is null\n" );
      return(0);
   }

   color->pixel = XGetPixel( ximage, 0, 0 );
   XDestroyImage( ximage );

   return(1);
}

The point behind that function is (more or less) to get information about a pixel at a given x,y coordinates relative to the window containing the current focus.

This is not what I want.

I want to select the window on top, not the window that has focus. Is there a way to do this? I don't want to give that window focus first.