First you when you get married you have to register your marriage( whatever country you are in) that will be your proof of relationship
Then police clearance certificate, her passport and family information form that will be signed by her originally .
You can send these documents to cic then you have to pay PR fees (450+590 or something to sure)
After that you guys will get medical request together .
Her name will appear as dependent on you file . Cic will add her on your file as dependent ( secondary) applicant