I can apply for a work permit extension only if I have one . I already had an open post graduate work permit. Which expired and then I applied for a course and got a two year study permit . As per rules I can apply for PGWP only once. Now what are my odds.If your file is in process, you apply for a work permit extension, it is some specific category WP, and that will be open, they will grant you 99%, you should have applied already, you are eligible to apply 4 months before expiry of your WP.
check this link:
http://www.cic.gc.ca/english/work/apply-who-permit-result.asp?q1_options=1i&q2_options=2c&q3_options=2c_i