secure wireless internet access point

i was trying to connect wireless internet to my wii from the one we have in the house. i was able to go in all the way upto choosing the wireless internet access point (in my case Bell 787) but it was secure. it asked me to enter the access point password which i know it is findable probably somewhere in the computers internet settings but i dont know where to look for. can some1 help me so i can know where i can find the password??