DisplayMode chosenMode = null;{
	 
	try {
	     DisplayMode[] modes = Display.getAvailableDisplayModes();
	 
	     for (int i=0;i<modes.length;i++) {
	          if ((modes[i].getWidth() == targetWidth) && (modes[i].getHeight() == targetHeight)) {
	               chosenMode = modes[i];
	               break;
	          }
	     }
	} catch (LWJGLException e) {     
	     Sys.alert("Error", "Unable to determine display modes.");
	     System.exit(0);
	}