I am on CPT working for a company and my CPT is till June 15, 2014, and I will still have two more semesters before I graduate and apply for OPT. My company will apply for my H1b in April 1st 2014. If my H1B gets approved in, say may 25 2014, will that cancel my CPT or my F1 status? Since the H1B doesn't really come into effect, until October 1st of 2014, do you think I can continue working for my employer using the remaining CPT and when CPT expires, can I continue to attend school as a full time student, until H1B kicks in?

Does my status change take effect when H1b is approved or when the H1b kicks in on Oct 1st, 2014? I have heard that when I apply for H1B, my company can request for change of status in the application?