>I have other buttons above this one also. When a user fills a text box and focus goes from the text
>box to one of these other buttons, and the user doesn't pay attention, say typing the letter 'c', it
>is as if the user had entered Alt + 'C' and the page clears. The question is how do I keep this
>form happening?

You could use SET CONFIRM ON so that the user needs to explicitly exit from the control, rather than moving out when it's full.