Yes, after few months, you can send her an invitation letter, which she'll add with her visit visa application while applying @ CHC Islamabad. Also, you'll need to provide Financial related documents in order to prove that either of you or both of you have more than enough funds to bear the expenses of Air Ticket, Living Cost and other Stuff. Also, she'll need to satisfy VO that she'll leave Canada at the end of her stay by showing either propert(y/ies) on her name, a job or any other home tie.
oh yeah i think u r right
so is it better that i apply for her after arriving canada (if i get visa)