>You can't hide the page, but you can remove it. In the PageFrame.Init, you can:
>IF !AllowAccess("Page2")
> This.RemoveObject("Page2")
>ENDIF

That might be the simplest because you probably won't want the "hidden" page back while the form is stilling open (making an assupmtion about the conditions).

Just comb the code to make sure you aren't referencing Pages that don't exist or aren't what you expect in the Pages array after they're gone.