Hmm. I guess the easiest way would be to use a session value or a cookie so, for example, the user comes to Page 1 then they click on a button to go to page two on the button click on page one set some sort of value in a session variable or cookie then redirect the user to page 2. On Page_Load on page 2 do a test to see if this value exists; if it does you know the user came from Page 1 otherwise redirect them back to page 1. The same logic would work going from page 2 to page 3.
hth.
-Doug
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Doug Parsons
Wrox online library: Wrox Books 24 x 7
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"Easy is the path to wisdom for those not blinded by themselves."
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