Opera 2d electromagnetic generator

hi...am doing simulation using OPERA 2D based on electromagnetic generator. my project was so simple that i only need to simulate the magnet with size 10mmx10mmx10mm like cube size..
what i know i need to assign north and south pole with specific equation...so that i can get the magnetic field lines..how can i do that to get the equation??..can anyone help me?

ok...i already got the answer...thanx for anyone who viewed this post...
just for sharing..for those who are using OPERA Vector Field software to simulate magnets like me...as we all know, that magnets with same pole will push one another but different magnets pole will attract each other...for flux simulation for simple magnet like that, we only need to change on modify properties when assign the type of material that we are using...In modify properties, the ?Material or phase angle? is changed from 0 to 90 degree. This is to indicate the direction of magnetization for the Ferrite magnet is vertically upwards. If you want it to be down, use 270 degree. The BH file for the magnet is ?ceramic8.bh?...
BTW am soooo happy that i manage to get the answer....hope this will help for those need this..hehe