Dual mon for XBMC

Hi all

i use the xbmc in my pc , there is use dual mon, i want mon 1 is play the xbmc, the mon 2 is working other, ex. intrernet, play game....., but how can the mon 1 is stay at the window? because when i watch the XBMC at mon1, then i use the mon 2 to work other, the XBMC will min. to the tool bar, so the dual mon can't use to the one time.....
how can setting to my mind ??

THANKS