when i lock the icons in their places , thats mean they should be immovable. but when i minimize the virtualbox and re-size it again, the icons going to be effected with changing in their places. c the photos for more clearness for what i have mentioned:-
http://s21.postimg.org/ikl6e27qu/lock_prob_1.jpg
http://s29.postimg.org/5j46db85i/lock_prob.jpg
so i think if the icons going to change according to the virtualbox screen size changing, then they should also re-changing when the virtualbox screen back to its original size.