Jeremy,
To add to Michel and Jim's posts...what you are describing sounds to me like a classic wizard-style situation that has a "Next>>" button on it that is enabled only after the critical information is entered. You might even want to set the tabs to .f. (or is it 0?) so that user only sees one page at a time and presses back or next to move through the tabs.

Just a thought.

>I created a pageframe with 2 pages. The first page had information that had to be filled out before the user went to page 2. To inforce this behavior, I added some valid code to the Pages deactivate method and if the valid returned false, issue a NODEFAULT to prevent the user from leaving this page.