How exactly does maternity leave work in canada?

I'm going on Maternity Leave in November. I was wondering how exactly does it work in British Columbia? I keep getting it confused with E.I. benefits or whatever. How does it work?

This may help...

http://www.hrsdc.gc.ca/en/lp/spila/wlb/wfp/11Maternity_Leave.shtml

If you have any questions it would be best to call "unemployment".