Visa Stamp and Last Lawful Entry

[PundaSmith]

Hello,

I have been on TN-1 since 2005, with yearly renewals until 2010, when my college applied for an H1B for me. This was approved in March 2011.

Since I received the approval notice (I-797), I have not travelled out of the US. Thus my last date of lawful entry was in 2009 when I applied for my last TN-1 at the border.

Now, I plan to visit Canada by the end of this year:

(1) on my departure, do I surrender my I-797 to the Canadian authorities ?

(2) on my return, do I have to validate my passport with an H1B stamp and get a new I-94?

(3) And does a new I-94 reset my date of last legal entry from 2009 to 2011?

Thanks very much for your input.

Rgds, Punda