Download the "Application Guideline Form - IMM5269E" and refer to it when filling in the information of different forms.IMM5269E - Page 12:
IMM5257 - Application for a Temporary Resident Visa
IMM 5645 - Family Information Form
Both of these are a must
until and unless you are from a country, whose citizens are Exempted and do not require a TRV for entrance into Canada and Pakistan is not one of them.