>>>It works fine except for the fact that when I start my form, I do not see tabs on a pageframe (they are hidden for some reason). Once clicked, they remain visible.
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>I think somehow it's a focus problem. I added to a form class a pageframe (class with PagesCount = 0) with 2 pages. I added two objects to the first page, but it doesn't change a thing yet. In other words, the form starts as a pageframe doesn't have pages at all. Once I click where the tab is supposed to be, it works fine.
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>Looks like VFP8 bug with a pageframe to me. Would you please try to replicate?
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>Thanks a lot in advance.

I don't quite see how you create pages. Are you doing it programmatically?
Btw, if you decide to use BindEvent then where you're going to Unbindevent?