The guide very helpful. If you are sponsoring your wife who lives outside Canada, here is the guide: http://www.cic.gc.ca/english/information/applications/guides/3999Etoc.asp
Dependant(s)
You, the principal applicant must answer each question on behalf of each of your dependant(s).
Note: Remember that all questions in this section are about your dependant.
You can add up to five (5) dependants in this form.
To add a new dependant to the application, click the “Add Dependant” button, located at the bottom of the page.
To remove a dependant from the application, click the “Remove Dependant” button.
If you have more than five (5) family members, you must complete the Additional Dependants/Declaration (IMM 0008DEP) (PDF, 472 KB) form for each additional family member in order to include everyone in your application.