How to hide an icon from system tray?

i want to hide the icon of utorrent from my tray icon. i tried "always hide" option on customize notifications. but i want it to completely invisible from tray. is there any freeware tool or shareware [torrent links please] by which i can hide the icon of utorrent from tray. it should have options like:start on system startup and hide icons [which are selected to hide] even after software is closed.
and "start in hidden mode" [utorrent should start in hidden mode when i start my PC]

i have tried master key of utorrent to hide but i want it to start in hidden mode after booting OS